Question 1 of 3 Which of the following is true about the random variables X, Y, and Z?
X is binomial with n = 20 and p = .22.
Y is binomial with n = 40 and p = .32.
Z is not binomial. All of the above are true.
Only (A) and (B) are true.
Question 2 of 3 What is the probability that exactly 2 of the 20 older adults prefer organic? (Note: Some answers are rounded.)
Question 3 of 3 What is the mean and standard deviation of the random variable Y (the number of younger adults out of 40 who prefer organic)? Answers may be rounded.
Mean: 12.8 Standard Deviation: 2.95
Mean: 40 Standard Deviation: .32
Mean: .32 Standard Deviation: 40
Mean: 12.8 Standard Deviation: 8.704
We cannot find the mean and standard deviation since the probability distribution table is not given.
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