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1. A credit card company...

1. A credit card company decides to study the frequency with which its cardholders charge for items from

a certain chain of retail stores. The data values collected in the study appear to be normally distributed with

a mean of 25 charged purchases and a standard deviation of 2 charged purchases. Out of the total number

of cardholders, about how many would you expect are charging 27 or more purchases in this study?

A. 47.8%

B. 94.8%

C. 68.3%

D. 15.9%

2. If the mean number of hours of television watched by teenagers per week is 12 with a standard deviation

of 2 hours, what proportion of teenagers watch 16 to 18 hours of TV a week? (Assume a normal

distribution.)

A. 4.2%

B. 0.3%

C. 4.5%

D. 2.1%

3. Consider an experiment that results in a positive outcome with probability 0.38 and a negative outcome

with probability 0.62. Create a new experiment consisting of repeating the original experiment 3 times.

Assume each repetition is independent of the others. What is the probabi

a certain chain of retail stores. The data values collected in the study appear to be normally distributed with

a mean of 25 charged purchases and a standard deviation of 2 charged purchases. Out of the total number

of cardholders, about how many would you expect are charging 27 or more purchases in this study?

A. 47.8%

B. 94.8%

C. 68.3%

D. 15.9%

2. If the mean number of hours of television watched by teenagers per week is 12 with a standard deviation

of 2 hours, what proportion of teenagers watch 16 to 18 hours of TV a week? (Assume a normal

distribution.)

A. 4.2%

B. 0.3%

C. 4.5%

D. 2.1%

3. Consider an experiment that results in a positive outcome with probability 0.38 and a negative outcome

with probability 0.62. Create a new experiment consisting of repeating the original experiment 3 times.

Assume each repetition is independent of the others. What is the probabi

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