Let S = {−35, 2, 17, 20, 26, 47} (a) Find the mean (or average) for the set S. [2] (b) Find the variance for the set S.(Round your answer to two decimal places.)(c) Find the standard deviation for the set S.(Round your answer to two decimal places.)

You are testing the claim that the mean GPA of night students is different from the mean GPA of day students. A sample of 24 night students and 28 day students and their GPA's are recorded below. Test the claim using a 1% level of significance. Assume the population variances are unequal and that GPAs are normally distributed. Give answers to 4 decimal places.   GPA-Night GPA-Day 3.05 3.38 2.91 3.02 3.27 3.4 3.29 2.73 3.3 3.24 3.35 2.69 3.39 3.25 3.52 3.33 3.39 2.33 3.25 3.51 3.08 3.07 3.27 2.9 3.32 3.48 3 2.94 3.62 2.93 3.64 3.31 3.54 2.62 3.45 2.66 3.29 3.27 3.56 2.76 3.15 2.7 3.4 3.27 3.51 2.96 3.54 2.86   3.24   2.72   2.64   3.14   What are the correct hypotheses? Note this may view better in full screen mode. Select the correct symbols in the order they appear in the problem.H0: Select an answer x̅₂ s² x̅₁ σ² μ₂ μ₁ p   ? = ≠ > < ≥ ≤  Select an answer 0 μ₂ x̅₂ x̅₁ σ² p s² μ₁ H1: Select an answer σ² x̅₂ x̅₁ μ₁ μ₂…

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

Listed below are amounts (in millions of dollars) collected from parking meters by Brinks. Find coefficient of variation The data were provided by the attorney for New York City, and they are listed on the DASL Web site. Use s= 2.137 Collection contractor was Brinks:  71 66 72  69  68  69 Group of answer choices 3.1% 11.5% 1.5% 4.1%

Make a frequency distribution for the data. X f 1 2 2 20 3 21 4 15 The sample mean is x = (Round to one decimal place as needed.)

Which of the following is True about the Z-score of an observation? A. The Z-score of an observation is defined as the number of standard deviations from the mean. B. If the observation is twice as large as the mean, its Z-score is 1. C. The Z-score of an observation is a number between 0 and 1. D. If the observation is right at the mean, its Z-score is 1.

Withdrawal symptoms may occur when a person using a painkiller suddenly stops using it. For a special type of painkiller, withdrawal symptoms occur in 1% of the cases. A random sample of 1100 people who have stopped using the painkiller is going to be taken. Let p be the proportion of people in the sample who experience withdrawal symptoms. Answer the following. (If necessary, consult a list of formulas.) (a) Find the mean of P. 0 (b) Find the standard deviation of p. 0 (c) Compute an approximation for P<0.02), which is the probability that fewer than 2% of the people in the sample experience withdrawal symptoms. Round your answer to four decimal places. 0 X

The correlation coefficient between variables X and Y is 0.62. What does this signify?   Question 8Answer a. When Y increases 1, X increases by 0.62 b. When X increases by 1, Y increases by 0.62 c. The variance shared by X and Y is less 20% d. The variance shared by X and Y is 62%

The height (in inches) of a random sample of players in NCAA Division 1 basketball teams is shown to the left.    x 75 80 75 87 77 77 67 83 77 80 73 82 73 71 80 76 72 78 68 74 74 72 76 86 77 77 78   10 Variance of the height:  s² = ________. a 25.53     b 24.08     c 22.72     d 21.88

R² is: O The ratio of the variance accounted for by the predicted values of Y to the variance accounted for by the observed values of Y. O The ratio of the variance accounted for by the observed values of Y to the variance accounted for by the predicted values of Y. O The MSR divided by the MS. O The SS, divided by the SSy.