Use the table, which gives the total amounts of
Question
Use the table, which gives the total amounts of
sales (in millions of dollars) foraerobic, basketball, cross-training, and walking shoes for the years 2005-2011. Determine which type of shoe shows greater variation: aerobic or cross-training.
Year
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Aerobic
Basketball
Cross- Training
Walking
2005
271
271
878
1448
1448
3673
2006
272
272
964
1523
1523
4091
2007
292
292
892
1584
1584
4197
2008
252
252
718
1640
1640
4204
2009
225
225
741
2055
2055
4416
2010
253
253
721
2148
2148
4256
2011
256
256
729
2159
2159
4299
Which type of shoe shows greater variation: aerobic or cross-training?
A.
Aerobic and cross-training have equal variances.
B.
Aerobic shows greater variation with a standard deviation of
million dollars.
C.
Cross-training shows greater variation with a standard deviation of
million dollars.
(Round to one decimal place as needed.)
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