Question

PLEASE ANSWER ALL QUESTIONS !

1. You are designing a study to find the number of dinners served at a restaurant each night. From a prior study, you estimate the standard deviation is 19.7 customers per hours. How many nights must you measure to know the average number of dinners served to within 1.1 dinners at 80% confidence?

Select one:

a. 525

b. 526

c. 527

d. 528

e. 529

2. A study of the U.S. workforce reveals that the average number of hours worked per week is between 32.5 and 36.9 at 95% confidence. A friend says that the number of hours worked must be 36 hours per week or more. Which of these is TRUE?

Select one:

a. It is unlikely that the U.S. workforce works for 36 hours per week, but it is possible.

b. It is reasonable to say that the U.S. workforce works for 36 hours per week.

c. It is impossible that the U.S. workforce works for 36 hours per week.

3. A study of the tourism economy in Myrtle Beach suggests that the average family on vacation spends between $850 and $1,040 per vacation in Myrtle Beach at 95% confidence. An expert on TV asserts that the average amount spent per vacation is $1,000. Which of the following statements is TRUE?

Select one:

a. It is impossible that families spend an average of $1,000 per vacation in Myrtle Beach.

b. It is possible that families spend an average of $1,000 per vacation in Myrtle Beach, but it is unlikely.

c. It is reasonable to say that the families spend an average of $1,000 per vacation in Myrtle Beach.

Answer 1