A sample of college students was asked how much they spent monthly on coffee. Approximate the standard deviation for the cost.
Monthly
coffee cost ($) |
Number of students |
|
---|---|---|
10.00-19.99 |
7 |
|
20.00-29.99 |
20 |
|
30.00-39.99 |
24 |
|
40.00-49.99 |
13 |
|
50.00-59.99 |
6 |
The sample standard deviation for the cost is __ (Round to the nearest cent as needed.)
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