Complaints about weekday airline flights not being on time average about 15 complaints per month at airports in small U. S. cities. The manager of the Countrytown airport took a random sample of months from their normally distributed population of monthly complaints about weekday arrivals not being on time. Since June 2011, her random sample of eleven months reveals that the number of complaints regarding weekday flights not being on time at the local Countrytown airport were:

7	8	10	12	13	14
14	15	16	17	17

The Countrytown airport is proud to advertise its claim that its average monthly number of complaints is fewer than the national monthly average for small city airports. Using the 0.05 significance level, does the data justify the Countrytown airport's claim?

Note: "MU" refers to the population mean.

Question 1

The null hypothesis should read: ..................

Question 2

The alternate hypothesis should read:..................

Question 3

What is the correct test statistic? Choose between thez-test and thet-test.

Question 4

Will theupper tail,lower tail, orboth tails be used?

Question 5

What is (are) the critical values? (Fill in the blank with the correct number to 4 decimal places.)..................

Question 6

What is the sample mean? (Fill in the blank with the correct number to 4 decimal places.)..................

Question 7

What is the population mean, MU? (Fill in the blank with the correct number to 4 decimal places.)..................

Question 8

Will you use thepopulation standard deviation or thesample standard deviation? <-- Choose only one.

Question 9

What number will you use for the standard deviation? (Fill in the blank with the correct number to 4 decimal places.)..................

Question 10

What is the computed value of the test statistic? (Fill in the blank with the correct number to 4 decimal places.)..................

Question 11

Does the test statistic fall in thecritical region or therejection region? <-- Choose one.

Question 12

Is your decisionnot to reject orto reject the null hypothesis? <-- Choose one.

Question 13

Is your decision in favor of thenull hypothesis or thealternate hypothesis? <-- Choose one.