11.) X is the amount of money withdrawn from an ATM machine at a bank. X has a normal distribution with mean $100 and standard deviation $60. Ten percent of the withdrawals are more than what amount? (Allow coins to be withdrawn as well as dollar bills.)

a) $23.20

b) None of the other choices is correct

c) $105.40

d) $176.80

12.) The probability density function, or pdf, tells you how dense the probability is at each particular point x. It does not tell you the probability at that point x.

a) True

b) False

13.) Suppose X has a binomial distribution with n = 5. Which of the following represents the probability that X is at most 3?

a) P(X <=3)

b) P(X>3)

c) P(X >=3)

d) P(X<3)

14.) Which of the following statements is correct?

a) The p-value does not change when your data changes, and neither does your value of alpha.

b) The p-value changes when your data changes and so does your value of alpha.

c) The p-value changes when your data changes, but the value of alpha stays the same.

d) The p-value does not change when your data changes, but your value of alpha does.

15.) Suppose your p-value is 0.13 and your significance level is 0.10. What do you decide?

a) Accept Ho

b) None of the other choices is correct

c) Fail to reject Ho

d) Fail to reject Ho or Accept Ho, they both mean the same thing

e) Not enough information to tell - need to know Ha.