Suppose X∼Bin(20,0.8).X∼Bin(20,0.8). What is the variance of XX?  A. 15 B. 16 C. 5 D. 10 E. 3.2

Q: Ques 3 ,4 and 5

A: This is a basic problem of central tendency . It is very useful.

Q: If r,, = 45, r, = .37 and r, , = .52 23 13 Find the Coefficients of multiple correlations.

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Q: Prove the following statement. Allow the data x1,..xn to have s ample mean of x and sample variance…

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Q: the compunted correlation between x any is 0.71. f x is the amount & doctric bill agl Y Is the…

A: Given information: The correlation between X and Y is 0.71. That is, r=0.71 Here, X is the amount of…

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A: We want to tell a skewness from box plot in given question

Q: The correlation of 4 pairs of observations is -0.94. What is E( )4 Sy Sx A. -1.03 В. — 1.75 С. -1.38…

A: Formula for correlation coefficient : r = 1n-1∑xi-x¯sxyi -y¯sy

Q: f there is an autocorrelation problem in the Y,-A+BX, +BX, +..+ AXu equation, which of the following…

A: Hello. Since your question has multiple parts, we will solve first question for you. If you want…

Q: Manually find the variance as explained in the lectures for the following values: 3, 6,8, 6, 10, 4.7…

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Q: Which correlation is the weakest? a) r = 0.8 b) r = -0.8 c) r = 0.3 d) r = -0.5

A: We have given the following correlation  a) r = 0.8 b) r = -0.8 c) r = 0.3 d) r = -0.5

Q: Q. 16. From the following data, find Q,, Q, D,, P 97 Marks : 14 21 23 28 30 34 39 42 No. of students…

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Q: Y g e ra 38. If covariance between X and Y variables is 10 and the variances of X and Y are…

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Q: 30-31. The variance of 100, 201, 203, 205 and 207 is 2168.2. The variance of 140, 165, 108, 250 and…

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Q: An analysis of variance produces SSbetween = 45, SSwithin = 120, and an F-ratio with df = 3, 20. For…

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Q: Find the value of the linear correlation coefficient r. 19.3 23.4 10.3 17.7 23.2 3 3 0.056 -0.236…

A: Given that    X Y X \cdot YX⋅Y X^2X2 Y^2Y2   19.3 3 57.9 372.49 9   23.4 3 70.2 547.56 9…

Q: Suppose Bob rolls a fair die 100 times and X = number of 1's he gets. What is the variance of X?

A: Given: n = 100 P( obtaining a 1 on die) = 1/6 = p X = number of 1's obtained

Q: 9. Tell whether the correlation coefficient would be closest to -1, 0 or 1. a. b. 150 150 150 100…

A: Given : Three diagram :

Q: Teacher Maria is perforpance varie te aching years, it extreme uass Sta She thinks that variance OF…

A: Given : Claim :  The variance of class standing is less than the unusual ( 100 squared points.)

Q: Use the linear correlation coefficient given to determine the coefficient of determination, R²,…

A: Correlation coefficient(R)=0.89

Q: 3) Choose the correct answer. Confirm your answer by testing the ordered pair in row 3 with y = kx.…

A: The given equation is y=kx. The ordered pair in row 3 is -7.6,-53.2. Substitute the ordered pair…

Q: X: 1 2 Y: 2 4 3456 7 9 12 14 What is the correlation coefficient for variables x and y? a..950 b.…

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Q: For the values 2, 4, 6 thee variance is 1.66 2.77 2.11 O 1.33 O 2.66

A: We have to find the variance from the given data.

Q: find the correlation coefficient r.   x y 5 8 9 10 11 13 17 19

A: Solution: The given data is

Q: The random variables A and B have variances 0.2 and 0.5 respectively. Let T= 5A+2B. The variance of…

A: Here given  Var(A) = 0.2 Var(B) = 0.5 T = 5 A + 2B

Q: An insurance company keeps a record of insurance plans sold per day for the past 150 days, as…

A: Solution: x =Number of Insurance plans sold per day  f= Frequency of occurance  x  (f) x2 fx fx2…

Q: PART A. Solve for the Pearson Product-Moment Coefficient of Correlation. 24 43 34 76 54 87 90 Y 34…

A: Given The data is as follows: x y 24 34 43 65 34 56 76 64 54 90 87 65 90 47

Q: The higher the value of a², the larger the variance of B2 given in var(ß,) =

A: Given that The variance of the estimator beta2 is given  We have to descriptive the higher the value…

Q: Which of the following better approximates the variance of the sample means? b. . N-1 a. 4

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Q: For a data set with variables a and b, we have s = 2, s7 = 4, N N, 10, and s 3. From a, and b, we…

A: Variance of g bar is 0.5.

Q: A sample of 8 random families' overall monthly water usage bill (in taka) is as follows: 187 310 280…

A: The data shows the overall monthly water usage bill of 8 random families.

Q: pls refer to the photo below.

A: We hwve to find null and alternative hypothesis.

Q: Consider a population of 8 students. Suppose we know the test scores of the students to be 3 4 5 6 7…

A: Given : To find : Mean and variance of the popl.

Q: The variability of the scores in a sample tends to be _____ the variability of the scores in the…

A: As, we know that larger the size of population,  larger the variability in the population,  if we…

Q: Give the best description of the correlation between V and I, assuming that a random voltage (V)…

A: Introduction: Denote the random voltage as V, the random current as I, and the constant resistive…

Q: Which of the following better approximates the variance of the sample means? a. 4 b. 2. VN-n Vn N-1

A: here given, σ = population standard deviation  N= population size  n= sample size

Q: Among the most common sources of random variation is: Оа. реоple O b. materials O c. equipment d.…

A: random variation represents the sum of many small variations, arising from real but small sauses…