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

A:

Q: Suppose a biologist collected data on the weight of 50 lab rats that were 3 weeks old. The boxplot…

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

A: Solution: The given data is

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…