Consider the following data set:

27,49,15,43,35,57,13,73,23,31,32,41,61, 39,7.

Suppose that you graph this data, with bins of size 10, with the first bin starting 1 below the smallest value in your data.

What is the range approximation for the standard deviation of this data?

What is the height of the fourth bar from the left in a relative frequency histogram?

What proportion of the data lies within two standard deviations of the mean?

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