A study has been conducted to determine whether the mean spending for internet services differs for residents of three cities. Random samples of people were selected from each city and their spending was recorded. The following ANOVA-single factor computer output was generated.

Anova: Single Factor

ANOVA

Source of Variation SS df MS F

Between Groups ? 2 12.3333333 ?

Within Groups             46.5714285 ? ?

Total                              71.2380952 20

a. Fill-in the missing values denoted by ‘?’.

b. Write down the appropriate null and alternative hypotheses.

c. Given the value of the tabulated F = 5.2 (α=.01), test the hypotheses you formulated in ‘b’ above.

d. Clearly state the test’s decision and conclusion. 

e. Do you need to calculate the LSD and perform pair-wise comparisons? Explain your answer.