21. Suppose Bob flips a fair coin 100 times. Let X be the number of heads he gets. What is the variance of X? Group of answer choices 25 50 5 Not enough information to answer None of the other choices...

21. Suppose Bob flips a fair coin 100 times. Let X be the number of heads he gets. What is the variance of X?

Group of answer choices

Not enough information to answer

None of the other choices is correct

22.
The 50th percentile of the standard normal (Z) distribution occurs at the number Z = 0.50.

Group of answer choices

True

False

Jun 07, 2022

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