StatCrunch Instruction: From the StatCrunch group, open the dataset WalMart Leng

Question

StatCrunch Instruction: From the StatCrunch group, open the dataset WalMart Lengths. With the dataset open, select Stat > ANOVA > One Way. Under the "Compare" heading, select Values in a single column. The responses are in the column Years, and the factors are in the column Region. Under "Options," check the box beside Compute Tukey HSD and change the level of confidence to 0.90. Click Compute. Use the output generated to answer the following:

1. Which of the multiple comparisons are correct?

Midwest vs. Northeast

Midwest vs. South

Midwest vs. West

Northeast vs. South

Northeast vs. West

South vs. West

It is not appropriate to consider multiple comparisons

2. What additional conclusions can be drawn? Select all that are statistically correct.

Wal-Mart stores in the West & Northeast have been opened the smallest mean length of time, although these two regions are not significantly different.

Wal-Mart stores in the West have been opened the second smallest mean length of time.

Wal-Mart stores in the South have been opened the greatest mean length of time.

Wal-Mart stores in the Midwest have been opened the second greatest mean length of time.

Wal-Mart stores in the Northeast have been opened the smallest mean length of time.

There are no significant differences in the mean length of time Wal-Mart stores have been open across the four regions.

Response statistics by factor RegionnMean Std. Dev. Std. Error Midwest 128 20.724206 8.4773401 0.74929809 Northeast 57 14.8969634.6030445 0.60968814 South236 23.881318 8.48234340.55215352 West 79 17.488154 5.5939968 0.62937381 ANOVA table Source DF Region3 5065.64921688.549728.234957

Explanation / Answer

1)
since p-value < 0.05
all 6 comparisons are correct
Midwest vs. Northeast

Midwest vs. South

Midwest vs. West

Northeast vs. South

Northeast vs. West

South vs. West

2)
South > Midwest > West > Northeast

Wal-Mart stores in the West have been opened the second smallest mean length of time.

Wal-Mart stores in the South have been opened the greatest mean length of time.

Wal-Mart stores in the Midwest have been opened the second greatest mean length of time.

Wal-Mart stores in the Northeast have been opened the smallest mean length of time.

first 4 options are correct

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