EM-3019
Comparing data with mean and standard deviation
E Math · Secondary 4 · Hard · Comparing data with mean and standard deviation
A shop recorded the daily sales (in dollars) for 40 days. The mean sales was and the standard deviation was . On another 40 days, the mean sales was and the standard deviation was . Which statement about the second set of 40 days is correct?
- Higher average sales and less variation in sales
- Higher average sales but greater variation in sales
- Lower average sales and less variation in sales
- Lower average sales but greater variation in sales
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