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A sample of college students was asked how much they spent monthly on coffee. Approximate the...

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 6

20.00-29.99 20 ​

30.00-39.99 . 23 ​

40.00-49.99 18 ​

50.00-59.99 . 6

The sample standard deviation for the cost is ​ ​(Round to the nearest cent as​ needed.)

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