Question: How much storage space does your music use? Here is a dotplot of the file sizes (to the nearest tenth of a megabyte) for 18

How much storage space does your music use? Here is a dotplot of the file sizes (to the nearest tenth of a megabyte) for 18 randomly selected files on Nathaniel’s mp3 player:

3 4 6. 7 8. File size (mb) 2.

a. The distribution of file size has a mean of x̅ =3.2 megabytes and a standard deviation of s_x = 1.9 megabytes. Interpret the standard deviation.

b. Suppose the music file that takes up 7.5 megabytes of storage space is replaced with another version of the file that only takes up 4 megabytes.

How would this affect the mean and the standard deviation? Justify your answer.

3 4 6. 7 8. File size (mb) 2.

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