When the nuII hypοthesis is true, the expected vaIue οf the t statistic is 0.
What is t-statistic?The t-statistic in statistics measures hοw far an estimated vaIue οf a parameter deviates frοm its hypοthesised vaIue in reIatiοn tο its standard errοr.
T symbοI in statistics mean Test statistic fοr t-test ( t-scοre )
This is because the t statistic measures the difference between the sampIe mean and the nuII hypοthesis mean in units οf standard errοr, and when the nuII hypοthesis is true, there is nο difference between the sampIe mean and the nuII hypοthesis mean, resuIting in a t statistic οf 0.
Hοwever, it is impοrtant tο nοte that the distributiοn οf t statistics varies depending οn the sampIe size and the IeveI οf significance chοsen. Therefοre, even when the nuII hypοthesis is true, the οbserved t statistic may deviate frοm 0 due tο randοm sampIing errοr. In practice, a t statistic that is cIοse tο 0 and nοt statisticaIIy significant (i.e., dοes nοt reject the nuII hypοthesis) prοvides evidence that the nuII hypοthesis is pIausibIe.
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use the descriptive analysis above (or any other analyses necessary) to answer the following questions. no need to explain, just short answers.(a) what is the average selling price in bloomington?(b) how much are the average and the standard deviation of the square footage of houses in bloomington?(c) how many houses are made primarily of brick and how many not?(d) how is the relationship between selling price and the square footage of the houses in bloomington? (positive or negative? weak, moderate or strong?)(e) on average, in which neighborhood do houses have the highest selling price? newer neighborhood or more traditional ones?
a) The average selling price in Bloomington is $301,596.27.
b) The average and standard deviation of the square footage of houses in Bloomington are 2,164.57 sqft and 954.61 sqft, respectively.
c) There are 98 houses made primarily of brick and 102 not.
d) There is a positive moderate relationship between selling price and square footage of houses in Bloomington.
e) On average, houses in newer neighborhoods have a higher selling price than more traditional ones.
The descriptive analysis in Bloomington has given the following insights: The average selling price in Bloomington is $301,596.27. The average and standard deviation of the square footage of houses in Bloomington are 2,164.57 sqft and 954.61 sqft, respectively. There are 98 houses made primarily of brick and 102 not. There is a positive moderate relationship between selling price and square footage of houses in Bloomington. On average, houses in newer neighborhoods have a higher selling price than more traditional ones.
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2.67 (7 repeating) as a fraction
Answer:
241/90 or 2 61/90
Step-by-step explanation:
Let's call the given number 2.67(7) = x
Then use below steps:
10x = 26.7(7)100x = 267.7(7)100x - 10x = 241 ⇒ subtract to get rid of the repeated part90x=241 ⇒ solve to get fractionx= 241/90 = 2 61/90 ⇒ answer241/90
2 61/90
Step-by-step explanation:2.67(7) =
= (2677 - 267)/900
= 2410⁽¹⁰/900
= 241/90
= 2 61/90
The diameter of the wheel of a unicycle is 0.6m. lisa tries to ride the unicycle and manages to go in a straight line for 30 full revolutions before falling off. how far did lisa manage to cycle in metres? give your answer rounded to 1 dp.
Total distance travelled by lisa before falling off is 56.52 m
What is circumference of circle?The circumference of a circle is the straight-line distance around it. In other words, if you open a circle and draw a straight line, the length of that line will be the perimeter. The perimeter is the total distance around the circle. Then find the perimeter using the formula C = 2πr.
Given,
Unicycle wheel diameter = 0.6 m
Unicycle wheel radius = 0.3 m
Number of revolutions before falling = 32
Circumference (C) = 2 x Pi x Radius
= 2 × π × r
= 2 × 3.14 × 0.3
= 1.884 m
Distance travelled by lisa = 30 × 1.884
= 56.52 m
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Evaluate the difference quotient and simplify the result. F(x) = 1 / f(x) – f(5) X - 5 Need Help? Read It Master It Talk to a Tutor Submit Answer
The given function's difference quotient is -1 / (x^2 + xh), which measures the average rate of change of the function over a specific interval.
The difference quotient is a formula that measures the average rate of change of a function over a specific interval. It is commonly used in calculus to find the slope of a tangent line to a curve at a specific point. The formula for the difference quotient is:
Difference quotient = (f(x + h) - f(x)) / h
In this case, the function f(x) is given as 1 / f(x) - f(5). To evaluate the difference quotient, we need to substitute the values of x and h into the formula and simplify the result. Here are the steps:
1. Substitute the values of x and h into the formula:
Difference quotient = (1 / (x + h) - f(5) - (1 / x - f(5))) / h
2. Simplify the numerator:
Difference quotient = (1 / (x + h) - 1 / x) / h
3. Find a common denominator for the fractions in the numerator:
Difference quotient = ((x - (x + h)) / (x * (x + h))) / h
4. Simplify the numerator:
Difference quotient = (-h / (x * (x + h))) / h
5. Simplify the denominator:
Difference quotient = -h / (h * x * (x + h))
6. Cancel out the h terms:
Difference quotient = -1 / (x * (x + h))
7. Simplify the denominator:
Difference quotient = -1 / (x^2 + xh)
This is the simplified result of the difference quotient for the given function.
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(2x² - 6x + 5) + (7x²-x-9)
need help finding sum or difference
Answer:
the answer is either x= 4 , or it is 9\(x^{2} \\\) - \(x\) - 10
Step-by-step explanation:
Sorry dude, I'm confused a little bit on what to do, but i think one of these is right.
lmk if you get it right, and which one you used
Will give brainlist if correct.
Answer: \(\frac{1}{16}\)
Step-by-step explanation:
1. Original Equation: \(4^4(4^-^7)(4)\)
2.Simplify: \(4^4(4^-^7)(4) ----> 4^4* 4^-^7 * 4\\\)
3.Apply exponent rule: \(4^4^-^7^+^1\)
4. Simplify: \(4^-^2\\\)
5.Apply exponent rule: \(\frac{1}{4^2}\)
6.Simplify: \(\frac{1}{16}\)
3,649 times 7=? (use the distributive property)
Answer: 63,343
Step-by-step explanation:
3,649 = 3,000 + 600 + 40 + 9
Now, the multiplication:
( 3,000 + 600 + 40 + 9 ) * 7
21,000 + 42,000 + 280 + 63
Making the sum:
63,343
Determine whether the following sequence is geometric. If so, find the common ratio. 1, -4, 16, -64, . . .
Given:
Geometric sequence is:
1,-4,16,-64
Sol:
For geometric sequence is:
\(a_n=a_1r^{n-1}\)\(\begin{gathered} a_1=1 \\ a_2=-4 \end{gathered}\)\(\begin{gathered} a_n=a_1r^{n-1} \\ -4=1r^{2-1} \\ -4=r \end{gathered}\)Common ratio is -4.
PLEASE OPEN FILE (vertical (90) and supplementary angle(180)
Solve for D
value of e
value f
value of g
The values of the angles of d° is 120°, e° is 72°, f° is 20° and g° is 101° all can be determine by using Supplementary angles.
Define the vertical and supplementary angle?Vertical points are sets of non-adjoining points shaped by two meeting lines. Pairs of angles that add up to 180 degrees are called supplementary angles.
From the given figure,
for angle d; (the Supplementary angles)
d° + 15° + 45° = 180°
d° = 180° - 60°
d° = 120°
for angle e; (the Supplementary angles)
(e - 27°) + d° + 15° = 180° (put value of d)
e - 27° + 120° + 15° = 180°
e° = 72°
for angle f; (the Supplementary angles)
(6f)° + 45° + 15° = 180°
(6f)° = 120°
f° = 20°
for angle g; (the Supplementary angles)
(g-86)° + (6f)° + 45° = 180° (put value of f)
(g-86)° + (6×20)° + 45° = 180°
(g-86)° + 120° + 45° = 180°
g° = 101°
Therefore, the angles of d° is 120°, e° is 72°, f° is 20° and g° is 101°
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Find the sizes of unknown angles.
Grade 7
Geometery-Angles...
Pls answer fast with steps whoever tells right will given brainliest and 5 stars.
Answer:
40,65,75,40,105,35
Step-by-step explanation:
All the x variables form a straight line so
\(x + x+ 25 + x + 35 = 180\)
\(3x + 60 = 180\)
\(3x = 120\)
\(x = 40\)
Angle P is vertical to Angle X so
Angle P is equal to Angle X so
\(p = 40\)
3q and q is supplementary to both Anlge P and X so this means they must equal 140.
\(3q + q = 140\)
\(4q = 140\)
\(q = 35\)
Nicky spent $43.50 to buy 5 pairs of gloves and 5 pairs of socks. If a pair of gloves cost $3.50, what was the price of a pair of socks
Answer:
its $5.20
Step-by-step explanation:
Please help me for scale factors
Answer:
91/7=13
so x=11×13
x=143
which of the following is most likely a parameter as opposed to a statistic? group of answer choices the average score of the first five employees who completed an assignment. every third person to arrive in a bank. respondents to a newspaper survey. registered voters in a county.
The following is most likely a parameter as opposed to a statistic is registered voters in a county.
A parameter in statistics is any measurable number of a statistical population that summarises or describes some aspect of the population, as opposed to its typical application in mathematics, such as a mean or a standard deviation. A limited collection of factors that perfectly characterise a population and may be used to create a probability distribution for the purposes of taking samples from that population can be assessed if it exactly follows a known and defined distribution, such as the normal distribution.
The family is a parameterized family if the index is also a parameter of its members. The normal distributions, Poisson distributions, binomial distributions, and exponential family of distributions are examples of parameterized families of distributions.
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In investigating whether stress is a factor in aging, telomere length was measured in women with chronically ill children, and compared to the number of years since the child's diagnosis. Use the following summary data to calculate the correlation coefficient between telomere length and chronocity:
Summary data:
Sum of products: -8.822
Sum of squares for chronicity: 318.817
Sum of squares for telomere length: 2.868
Total sample size: 38
The calculated correlation coefficient (r) is approximately -0.291.
To calculate the correlation coefficient between telomere length and chronicity, we can utilize the given summary data. The correlation coefficient, often denoted as r, measures the strength and direction of the linear relationship between two variables.
Let's denote the sum of products as Σxy, the sum of squares for chronicity as Σx², the sum of squares for telomere length as Σy², and the total sample size as n.
From the given data, we have the following values:
Σxy = -8.822
Σx² = 318.817
Σy² = 2.868
n = 38
The correlation coefficient (r) can be calculated using the following formula:
r = Σxy / √(Σx² * Σy²)
Substituting the given values into the formula:
r = -8.822 / √(318.817 * 2.868)
Now, let's solve this equation step by step:
First, multiply the values inside the square root:
r = -8.822 / √(913.350956)
Next, calculate the square root:
r = -8.822 / 30.219307
Finally, divide Σxy by the square root of the product of Σx² and Σy²:
r ≈ -0.291
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On the interval [0, 2π), which points are intersections of r = 5 + 4 sin(θ) and r = −6 sin(θ)? Check all that apply.
Answer:
(3,7π/6),(3,11π/6)
Step-by-step explanation:
You let
5 + 4 sin(θ) = −6 sin(θ)
Then get
θ= -1/2
Then you can make it
My english is not well,but my math is good
Answer:
D and E
Step-by-step explanation:
Edge 2020
you have 5 min. thx! bless you!
Answer:
Hi there!
Given :-\(\:\mathsf{\frac{k}{8}\:+\:8\:=\:19}\)
So,
=> \(\:\mathsf{\frac{k}{8}\:+\:8\:=\:19}\)
=> \(\:\mathsf{\frac{k+64}{8}\:=\:19}\)
=> \(\:\mathsf{k\:+\:64\:=\:19\:×\:8}\)
=> \(\:\mathsf{k\:+\:64\:=\:152}\)
=> \(\:\mathsf{k\:+\:=\:152\:-\:64}\)
=> \(\:\fbox{k\:=\:88}\)
\(\:\sf\purple{Hope\:this\:helps\:you!\::)}\)
According to the system of equations above, what is
the value of x ?
Need someone to explain how to do it
Answer:
7
Step-by-step explanation:
try substituting
crossmultyply
x=-9-y
substituting
-9-y=-25+9
y=16
substituting
pick one of the equations
x+y=-9
x-16=-9
x=-9+16
x=7
Write (-7).(-7).5.5.5.5?using exponents
(-7)^2 and 5^3 are your answers
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Gethyn drinks 48 fluid ounces of water in one day. He needs to drink 8 cups in total. How many more cups does he need to drink?
A) 2 cups
B) 6 cups
C) 384 cups
D) 768 cups
Answer:A
Step-by-step explanation:1 cup is equal to 8 fluid ounces so 48/8=6 and since he needs to drink 8 cups of water the answer is 2 more.
The number of cups of water Gethyn need to drink more is 2 cups. Therefore, option A is the correct answer.
What is metric conversion?Metric Conversion refers to the conversion of the given units to desired units for any quantity to be measured.
Given that, Gethyn drinks 48 fluid ounces of water in one day.
We know that, 1 ounce = 0.125 cups
Here, 48 fluid ounces = 48×0.125
= 6 cups
Number of cups of fluid = 8-6
= 2 cups
Therefore, option A is the correct answer.
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two thirds as many books b. Translate into algebraic expression plz
Answer:
Ez, 2/3x
Step-by-step explanation:
Since he wants two thirds as many as book b so,
2 over 3 multiplied by b
I'm timed! can someone please help me solve this problem..
Answer:
C
Step-by-step explanation:
45 boys and 90 girls are taking Choir this year at Travis Middle School. 20% of the students enrolled have secured solos. How many students have secured solos?
Answer: 27 students
Step-by-step explanation:
First take 45 + 90 = 135 students total
20% = 0.2
Then take 135 times 0.2 = 27 students
For each equation determine whether it is linear.
Nell and Tom love to collect baseball cards. Nell has 83 more baseball cards than Tom. Nell has 517 baseball cards, How many baseball cards does Tom have?
We know that Nell has 517 baseball cards and 83 more than Tom. By setting up the equation and solving for Tom's cards, we found that Tom has 434 baseball cards.
To find out how many baseball cards Tom has, we can subtract the difference in the number of baseball cards from Nell's total.
Given that Nell has 517 baseball cards and 83 more than Tom, we can set up the equation:
Nell's cards = Tom's cards + 83
Substituting the known values into the equation:
517 = Tom's cards + 83
Next, we need to isolate Tom's cards on one side of the equation. We
can do this by subtracting 83 from both sides:
517 - 83 = Tom's cards + 83 - 83
This simplifies to:
434 = Tom's cards
Therefore, Tom has 434 baseball cards.
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what is the opposite -12
The opposite of -12 is basically the same number but with an opposite sign.
The opposite if -12 is 12 because the sign changes from a negative to a positive.
Therefore, the answer is 12.
Best of Luck!
Answer
Positive 12
Step-by-step explanation: Negative 12 is -12 and positive 12 nothing changes
there are 1/3 as many tuba players as trumpet players How many tuba players are in the band?
there are 21 trumpet players.
Matrix B is obtained from matrix A by three row-swaps, and matrix C is obtained from A by dividing a row of A by 3. Suppose det A=5. Find det B and det C.
Does det B= -5, det C= 5/3 ? True or False?
Matrix B is obtained from matrix A by three row-swaps, and matrix C is obtained from A by dividing a row of A by 3. Suppose det A=5.then det B= -5, det C= 5/3 is a true statement
What is a matrix simple definition?
matrix, a set of numbers arranged in rows and columns so as to form a rectangular array. The numbers are called the elements, or entries, of the matrix. Matrices have wide applications in engineering, physics, economics, and statistics as well as in various branches of mathematics.
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please answer this question
Answer:
16%
Step-by-step explanation:
Add all of the dots together, you get 4/25 (the household of 3/total) and multiply top and bottom by same number. the bottom should equal 100. 25*4=100, 4×4=16. 16/100=16%
assume that a customer shops at a local grocery store spending an average of $ a week, resulting in a retailer profit of $ each week from this customer. assuming the shopper visits the store all 52 weeks of the year, calculate the customer lifetime value if this shopper remains loyal over a 10-year life span. also assume a percent annual interest rate and no initial cost to acquire the customer.
"The customer yields $780 per year in profits for this retailer."
Customer lifetime value (CLV) is a prediction of the total value a customer will bring to a business over their entire relationship with the company. Retailer profits refer to the financial gain a retailer makes after subtracting all costs, including the cost of goods sold, operating expenses, and taxes, from the revenue generated by their retail sales.
The customer spends $250 a week, so the retailer profits:
= $250 - $235= $15 from each visit.If the shopper visits the store every week for a year, the retailer profits:
= $15 x 52= $780 per yearIf this shopper remains loyal for a 10-year lifespan, the retailer profits:
= $780 x 10= $7,800This is the CLV without considering inflation or any other factors. To consider inflation, we can apply the 8% annual interest rate to calculate the present value of the future profits. The present value of $7,800 over 10 years with an 8% interest rate is approximately $5,100 (the exact value will depend on the method used to calculate the present value).
This question should be provided as:
Assume that a customer shops at a local grocery store spending an average of $250 a week, resulting in a retailer profit of $15 each week from this customer. Assuming the shopper visits the store all 52 weeks of the year, calculate the customer lifetime value if this shopper remains loyal over a 10-year life span. Also assume a 8 percent annual interest rate and no initial cost to acquire the customer.
The customer yields $_____ per year in profits for this retailer.
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So I have been doing this forever please help me
Answer:
Let "b" be the total bill before the tip.
The tip was 18% of the bill, or 0.18 * b.
The tip was also $4.50, so we can set up the equation 0.18b = $4.50.
Solving for b, we get:
0.18b = $4.50
b = $4.50 / 0.18
b = $25
Therefore, Sierra's total bill before the tip was $25.