Suppose the random variables x and y have joint pdf f(x,y) = 8,0 < x < y < 4. Find the marginal pdf f2(y) of Y
y/16,0
y/8,0
y^2/x,0
y/8x,0
Answers
The marginal pdf of Y is given by:
f2(y) = {
16 - 4y, for 0 < y < 8
0, otherwise
}
To find the marginal pdf f2(y) of Y, we need to integrate the joint pdf f(x,y) over all possible values of x:
f2(y) = ∫ f(x,y) dx, for y/2 < x < 4
From the given joint pdf, we see that f(x,y) = 8 for 0 < x < y < 4. Thus, we have:
f2(y) = ∫ 8 dx, for y/2 < x < 4
= 8(x)|y/2 to 4
= 8(4-y/2)
= 16 - 4y, for y/2 < x < 4
= 0, otherwise
So the marginal pdf of Y is given by:
f2(y) = {
16 - 4y, for 0 < y < 8
0, otherwise
}
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Related Questions
a characteristic, usually a numerical value, which describes a sample is called a _______. a. parameter b. statistic C. constant d. variable
Answers
Answer: B. statistic
Step-by-step explanation: A characteristic, usually a numerical value, which describes a sample, is called a statistic.
Whats the answer y’all
Answers
The expressions that will give you a difference of 5 are: -3 - (-8) and 1 - (-4).
What is the Difference of Two Expressions?The difference of two expressions is determined by subtracting one from the other.
Find the difference of each of the expressions given to determine which will give us 5.
-3 - (-8)
= -3 + 8
= 5
-2 - 3 = -5 [this is not the same as 5]
1 - (-4)
= 1 + 4
= 5
7 - (-2)
= 7 + 2
= 9
-3 - (-8) and 1 - (-4) will give us a difference of 5.
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There are 4 questions I need help with (all the same topic).
The answer needs to be as a surd, please help me. I'm stuck, I've done a few like this but I'm confused for this one. (Please explain your working clearly, I'm not smart enough to understand).
Answers
The simplified form of the given expression is 4/√6. Therefore, option D is the correct answer.
What are surds?A surd is an expression that includes a square root, cube root or other root symbol. Surds are used to write irrational numbers precisely – because the decimals of irrational numbers do not terminate or recur, they cannot be written exactly in decimal form.
The given expression is 6√2/√3 - 8/3√(3/2).
Here, 6√2/√3 - 8√3/3√2
= 6√2/√3 - 8/√3√2
= 6√2/√3 - 8/√6
= 12/√6- 8/√6
= 4/√6
Therefore, option D is the correct answer.
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Tamarisk company began operations on january 2, 2019. It employs 9 individuals who work 8-hour days and are paid hourly. Each employee earns 9 paid vacation days and 7 paid sick days annually. Vacation days may be taken after january 15 of the year following the year in which they are earned. Sick days may be taken as soon as they are earned; unused sick days accumulate. Additional information is as follows. Actual hourly wage rate vacation days used by each employee sick days used by each employee 2019 2020 2019 2020 2019 2020 $6 $7 0 8 5 6 tamarisk company has chosen to accrue the cost of compensated absences at rates of pay in effect during the period when earned and to accrue sick pay when earned
Answers
The total cost of compensated absences for Tamarisk Company for the years 2019 and 2020 was $348 + $1,399 = $1,747.
To calculate the cost of compensated absences for Tamarisk Company, we need to calculate the number of vacation days and sick days earned by the employees in 2019 and 2020, and then calculate the cost of the days earned but not taken.
Each employee earns 9 vacation days per year. As they can be taken after January 15th of the year following the year in which they are earned, the vacation days earned by the employees in 2019 can be taken in 2020. Therefore, in 2019, no vacation days were taken by any employee.
In 2020, the employees took a total of 8 vacation days. As there are 9 employees, the total vacation days taken in 2020 were 9 x 8 = 72.
Sick Days:
Each employee earns 7 sick days per year, and unused sick days accumulate. In 2019, the employees used a total of 5 sick days. Therefore, the unused sick days at the end of 2019 were 9 x 7 - 5 = 58.
In 2020, the employees used a total of 6 sick days, and the unused sick days at the end of 2020 were 58 + 9 x 7 - 6 = 109.
To find the cost of compensated absences. The unused sick days and vacation days must be multiplied to get the hourly wage rate in effect in a year.
In 2019, the cost of compensated absences was 58 x $6 = $348.
In 2020, the cost of compensated absences was (72 + 109) x $7 = $1,399.
Therefore, the total cost of compensated absences for Tamarisk Company for the years 2019 and 2020 was $348 + $1,399 = $1,747.
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If it takes an airplane 3 hours to fly 3600 miles, how long will it take to fly
5400 miles. Use a decimal for your answer rounded to the nearest tenth.
Answers
The number of hours it will take the airplane to fly the given distance would be = 4.5 hours
How to calculate the number of hours that can be used for the distance?To calculate the number of hours that can be used for the distance, the following needs to be done. That is;
The number of hours it take to complete 3600 miles = 3 hours
Therefore the number of hours it will take to complete 5400miles = X hours.
That is;
3600 miles = 3 hours
5400 miles = X hours
make X the subject of formula;
X = 5400×3/3600
= 16,200/3600
= 4.5 hours.
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plzzzzz helppppppp
Using the graphs below, evaluate f(g(1)).
Answers
♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️
\(g(1) = 3\)
♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️
f( g(1) ) = f ( 3 ) = 6
Review this code snippet: var time = 15; var greeting; if ( time < 12 ) { greeting = “good morning”; } else if ( time < 18 ) { greeting = “good afternoon”; } else { greeting = “good evening”; } console.log(greeting); What is the message that gets printed to the console?
Answers
Explanation:
We're given that time = 15
From this, we see that time < 12 evaluates to false, because 15 is not smaller than 12. Put another way, 15 < 12 is false.
But time < 18 is true since 15 < 18 is true. So we execute the second block of code and have the greeting variable be set to the string "good afternoon". This is what's displayed to the console without any quotes of course.
a test has 75 questions worth 216 points total. the test consists of multiple-choice questions worth 2 points each and short answer questions worth 4 points each. how many of the total points on the test are from short-answer questions? do your figuring here.
Answers
There are 33 short-answer questions on the test and 33 * 4 = 132 points are from short-answer questions.
What is algebra ?
Algebra is a branch of mathematics in which letters and symbols are used to represent numbers and quantities in equations and formulas. Algebraic concepts include operations such as addition, subtraction, multiplication, and division.
We know that the test has 75 questions and it is worth 216 points total.
We know that multiple-choice questions worth 2 points each and short answer questions worth 4 points each.
To calculate the number of points from short-answer questions, we need to find out how many questions are short-answer and multiply that by 4 (points per question).
Let x be the number of short-answer questions.
We know that x + 75 - x = 75, which is the total number of questions on the test.
Also, we know that x * 4 + (75-x) * 2 = 216, which is the total number of points on the test.
Solving for x, we get:
x * 4 + 150 - 2x = 216
2x = 66
x = 33
So there are 33 short-answer questions on the test and 33 * 4 = 132 points are from short-answer questions.
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the number of rationl number between any 2 rational number
Answers
Answer:
Step-by-step explanation:
hello friend !!!!!!!!!
There are infinite no. of rational no's between any two rational no's
hope this helps
plz mark as brainliest!!!!!!!
example: between 1 and 2, there are an infinite number of rational numbers including 1.5, 1.75, 1.888, etc.
Advertisements for an instructional video claim that the techniques will improve the ability of Little League pitchers to throw strikes and that, after undergoing the training, players will be able to throw strikes on at least 60% of their pitches. To test this claim, we have 20 Little Leaguers throw 50 pitches each, and we record the number of strikes. After the players participate in the training program, we repeat the test. The table shows the number of strikes each player threw before and after the training. Before,After 28,35 29,36 30,32 32,28 32,35 32,34 32,32 32,34 32,35 33,36 33,33 33,35 34,32 34,30 34,33 35,34 36,37 36,33 37,35 37,36 For the variables in your dataset calculate the difference between the number of strikes thrown before and after.
Answers
The main answer is that the difference between the number of strikes thrown before and after the training program for the Little League pitchers is as follows: -7, -7, 2, 4, 3, 2, 0, 2, 3, 3, 0, 2, -2, -4, -1, -1, 1, -3, -2, -1.
The table provides the number of strikes each player threw before and after the training program. To calculate the difference between the number of strikes thrown before and after, we subtract the "After" value from the "Before" value for each player.
For example, for the first player, the difference is 35 (After) - 28 (Before) = -7. Similarly, for the second player, the difference is 36 - 29 = -7. We repeat this calculation for each player and obtain the following differences: -7, -7, 2, 4, 3, 2, 0, 2, 3, 3, 0, 2, -2, -4, -1, -1, 1, -3, -2, -1.
These differences represent the change in the number of strikes thrown by each player after undergoing the training program. A negative difference indicates a decrease in the number of strikes, while a positive difference indicates an improvement. The range of differences is from -7 to 4, showing that the impact of the training program varied among the players.
It's important to note that the claim made in the advertisements suggested that players would be able to throw strikes on at least 60% of their pitches after the training. However, the difference values alone do not provide information about the success rate in terms of percentage. To determine if the training program was effective in meeting this claim, further analysis is needed, such as calculating the strike percentage for each player before and after the training and comparing them to the expected 60% threshold.
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Que es un cuarto de la cantidad n
Answers
Please help me with my work
Answers
Answer:
8*4+3*2
Step-by-step explanation:
Answer:
38. hope i'm right
Step-by-step explanation:
What are independent variables and dependent variables when
conducting a research design to investigate the impact of a school
nutrition program on grade performance of students at high
school?
Answers
Independent variables are the factors that are manipulated or controlled by the researcher in a study. In the context of investigating the impact of a school nutrition program on grade performance of high school students, the independent variable would be the school nutrition program itself.
The researcher would design and implement the program, and this variable would be under their control.
Dependent variables, on the other hand, are the outcomes or variables that are measured in a study and are expected to change as a result of the independent variable. In this case, the dependent variable would be the grade performance of the students. The researcher would collect data on the grades of the students before and after the implementation of the nutrition program, and this would be the variable that is expected to be influenced by the independent variable.
In summary, the independent variable in this research design is the school nutrition program, while the dependent variable is the grade performance of the students. The researcher would manipulate the independent variable (implement the nutrition program) and then measure the dependent variable (student grades) to determine if there is an impact of the program on grade performance.
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-4x-10x plzz help what is it
Answers
\(\sf{hey\:}\) \(\sf\cancel{mate\:Here\:}\) \(\sf\red{is\:ur\:answer}\)
\( - 4x - 10x = - 14x\)
Answer:
-14x
Step-by-step explanation:
Subtract 10 from -4,
(With negatives subtracting is basically adding a negative and adding is basically taking away a negative)
hope this helps :)
need help with math thanks
Answers
Answer:
Use mathematical skills to acquire the correct answer of 7.
Step-by-step explanation:
Hee hee hee haw.
Answer:
7 is the answer
Step-by-step explanation:
3x + 8 = 29
or, 3x + 8 - 8 = 29 - 8
or, 3x = 21
or, 3x/3 = 21/3
or, x = 7
Find the volume of a cylinder if the radius is 3 and the height is 9
Answers
Answer:
81pi
Step-by-step explanation:
pi3^2=9pi
9pi * 9 = 81pi
Answer:
254.34 un³
Step-by-step explanation:
π × 3² × 9
π × 9 × 9
3.14 × 9 × 9
254.34
pharmaceutical company conducts an experiment in which a subject takes 75 mg of a substance orally. the researchers measure how many seconds it takes for one quarter of the substance to exit the bloodstream. what kind of variable is the company studying?
Answers
The pharmaceutical company uses the quantitative variable to conducts an experiment.
Variables:
A variable is a characteristic of an object. Their values may occur more than once for a set of data. We consider just two main types of variables in this course.
Quantitative Variables - Variables whose values result from counting or measuring something.
Qualitative Variables - Variables that are not measurement variables. Their values do not result from measuring or counting.
Given,
A pharmaceutical company conducts an experiment in which a subject takes 75 mg of a substance orally.
And the researchers measure how many seconds it takes for one quarter of the substance to exit the bloodstream.
Here we need to find the kind of variable is the company studying.
Here the company uses the Qualitative Variable because here they measure the effects of the medicine not the measurement.
So, the experiment uses the Qualitative Variable.
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HELPPP PLEASEEE!!!!!!!
Answers
Answer:
CFX, ADC
Step-by-step explanation:
CFX is just a larger version of AEX. Same thing with CFX.
how to find the scale factor of 10 cm=5m
Answers
The scale factor of 10cm to 5m is 50.
What is scale factor?The scale factor is a measure for similar figures, who look the same but have different scales or measures.
For example ,if a length of 5cm is doubled and it gives a length 10cm, the scale factor is 10/5 = 2. This means that we can express scale factor with a formula;
scale factor = new dimension / old dimension
Here, the old dimension is 10cm and the new dimension is 5m. We need to convert the 5m into cm
therefore 5m = 5× 100 = 500cm
therefore scale factor = 500/10 = 50
This means the scale factor of 10cm = 5m is 50
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3x+2+3x+4=5x+9
Solve for x
Answers
Answer:
4
Step-by-step explanation:
\(3x+2+3x+3=5x+9 \\ \\ 6x+5=5x+9 \\ \\ x=4\)
Step-by-step explanation:
\(x = \frac{4}{3} \)
\(1. \: 6x + 6 = 5 + 9 \\ 2. \: 6x + 6 = 14 \\ 3. \: 6x = 14 - 6 \\ 4. \: 6x = 8 \\ 5. \: x = \frac{8}{6} \\ 6. \: x = \frac{4}{3} \)
Solve by substitution.
y = 2.3 - 11
-2 + y = -4
Solution:
Answers
Answer:
Number 1: -8.7. Number 2: -2
Step-by-step explanation:
To find the first one, subtract 11 from 2.3.
2.3-11= -8.7 , so that's the answer for the first one.
To find the answer to the second one, just do -4+-2=-2, so that's the answer for the second one.
Q2- write down the answer of the following
1- Specialize formula (3) to the case where:
Rc(t)=e-λct And
Rv(t)=e-λct
2-derive expressions for system reliability and system mean time
to failure
3- t
Answers
The following are the answers for the given questions: 1. Specialized formula (3) to the case where: Rc(t) = e-λct and Rv(t) = e-λct.
What are the answers?The specialized formula (3) for the given values of Rc(t) and Rv(t) can be calculated as follows:-
R(t) = e-(λc + λv)t2.
Derive expressions for system reliability and system mean time to failure.
The expressions for system reliability and system mean time to failure can be calculated as follows:-
System Reliability(R(t))= Rc(t) + Rv(t) - Rc(t) * Rv(t).
System Mean Time To Failure(MTTF) = 1 / (λc + λv)3.
We need more information about what to find at t because there is no information given in the question.
So, we can't say what to find at t without any relevant information.
Please provide the relevant information about t so that we can provide you with the answer to your question.
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What is the equation of the line that has a slope of 3 and goes through the point (-3,-5)?
O A. y=3x+4
OB. y= 3x - 14
O cy=3x-4
OD. y= 3x+12
Answers
Answer:
y = 3x + 4
Step-by-step explanation:
Given:
Coordinates
(-3 , -5)
Slope m = 3
Find;
Equation of slope
Computation:
Given, x1 = -3 and y1 = -5
Equation of slope = y - y1 = m(x - x1)
Equation of slope = y - (-5) = 3(x + 3)
Equation of slope = y + 5 = 3x + 9
Equation of slope = y = 3x + 9 - 5
Equation of slope = y = 3x + 4
y = 3x + 4
How much of a(n) 70% orange juice drink must be mixed with 18 gallons of a 30% orange juice drink to obtain a mixture
that is 50% orange juice?
Answers
Answer:
18 gallons
Step-by-step explanation:
Start with x gallons of 70% juice and 18 gallons of 30% juice.
Result: x + 18 gallons of 50% juice
0.7x + 0.3 × 18 = (x + 18)(0.5)
0.7x + 5.4 = 0.5x + 9
0.2x = 3.6
x = 18
Answer: 18 gallons
when npv=0, then: group of answer choices irr=0 irr greater than required return irr=required return irr less than 0 irr greater than 0
Answers
When NPV is zero, it does not dictate the specific IRR value or its relationship with the required return. IRR could be 0, greater than 0, greater than the required return, or less than 0.
When the net present value (NPV) is zero, it means that the present value of the cash inflows is equal to the present value of the cash outflows. In this scenario, the internal rate of return (IRR) can be evaluated using the following answer choices:
IRR = 0: This means that the IRR is equal to zero. However, it does not necessarily imply that the NPV is zero. NPV and IRR are independent metrics, so it is possible for the IRR to be zero even when the NPV is not zero.
IRR greater than the required return: The required return represents the minimum acceptable rate of return for an investment. If the IRR is greater than the required return, it implies that the project is expected to generate returns higher than the minimum required. In this case, the NPV would typically be positive.
IRR less than 0: This means that the IRR is negative. If the IRR is negative and the NPV is zero, it suggests that the project’s cash outflows are greater than its cash inflows, resulting in a zero NPV.
IRR greater than 0: This option states that the IRR is greater than zero. It does not directly relate to the NPV being zero. The NPV can be positive or negative when the IRR is greater than zero, depending on the specific cash flows and the required return.
Hence, when the NPV is zero, it does not determine a specific value for the IRR or its relationship with the required return. The IRR and NPV are separate evaluation metrics used to assess the profitability of an investment project.
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What is the distance between point A(-9, 15) and B(26, -2)?
A. 38.91
B. 52
C. 39
D. 30.59
Answers
Answer:
A 38.91
Step-by-step explanation:
distance formula = d= √((x2-x1)²+(y2-y1)²)
In general, what can you say about the difference when you subtract a larger integer from a smaller integer?
Answers
Answer:
To subtract integers, change the sign on the integer that is to be subtracted. If both signs are positive, the answer will be positive. If both signs are negative, the answer will be negative. If the signs are different subtract the smaller absolute value from the larger absolute value
URGENT HELP NEEDED PLEASE
Answers
Step-by-step explanation:
Area of a triangle = 1/2 * base * height
For this triangle base = 9 m height = 8 m
1/2 ( 9 ) ( 8) = 36 m^2
All you need for triangular area is the base length and the height:
A=1/2•b•h
Add 3 and 6 for the total base of 9. So,
A= 1/2 (9) (8)
This gives you and Area of 36 meters squared.
Hope this helps!
Please help im timed:)
Answers
Answer:
A
Step-by-step explanation:
Simplify and subtract.
Answer:
Step-by-step explanation:
4(0.5x+2.5y-0.7x-1.3y+4)
2x+10y-2.8x-5.2y+16
-0.8x+4.8y+16
Please help within the next hour
Answers
Answer:
it's x= 1±sqrt(47)
Step-by-step explanation: