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A: Subtract, Giving you 26.4

B: Varibility is not the same because  more girls texted.

Step-by-step explanation:

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part A

 . − . = .

The difference in means is . .

.

.

= .

Using the larger MAD of . ., the means are separated by . MADs. Looking at the dot plots, it certainly

seems as though a separation of more than MADs is meaningful.

part B

The MAD for the boys’ number of minutes spent texting is . ., which is higher than that for the girls, which is

. . This is not surprising, as seen in the dot plots. The typical deviation from the mean of . is about

. . for boys. The typical deviation from the mean of . is about . . for girls.

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step-by-step explanation: