11) Using Set up 2, in any given sample, what is the likelihood that the mean is between 91 and 93.5 feet?

Group of answer choices

0.6250

0.6858

0.8604

0.2354

12) Set up 3: The tread life of tires mounted on light-duty trucks follows the normal probability distribution with a mean of 65,000 miles and a standard deviation of 5,000 miles. If the standard error of the mean is 845.15 what is the sample size to the nearest whole number?

Group of answer choices

35

30

4000

Cannot be determined.

13) Using Set up 3, Suppose we select a sample of 40 tires and use a simulator to determine the tread life. What is the likelihood of finding that the sample mean is between 64,050 and 65,950?

Group of answer choices

0.4453

0.7705

0.7390

0.1147

14) Set up 4: The Intelligence Quotient (IQ) test scores for adults are normally distributed with a mean of 100 and a standard deviation of 15. What is the probability we could select a sample of 50 adults and find that the mean of this sample is between 97 and 104?

Group of answer choices

0.8271

0.0786

0.8917

0.7485

15) Using Set up 4, what is the probability we could select a sample of 60 adults and find that the mean of this sample exceeds 106?

Group of answer choices

0.0010

0.9412

Approximately one

0.0092

20) Using Set up 5, what is the chance that less than 20% say they need math help?

Group of answer choices

About 0%

About 6%

About 90%

Not enough information