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Rin incorrectly calculated the mean absolute deviation for the data set 25,25,31,36,38.Her work is shown here.

1. Find the mean.

Mean =
25 + 25 + 31 + 36 + 38
5
=
155
5
= 31

2. Find each absolute deviation.

Absolute deviations:6,6,0,5,7

3. Find the mean absolute deviation.

MAD =
6 + 0 + 5 + 7
4
=
18
4
= 4.5

In which step did Rin make an error?

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Two students were asked if they liked to read. is this a good example of a statistical question? why or why not? a yes, this is a good statistical question because a variety of answers are given. b yes, this is a good statistical question because there are not a variety of answers that could be given. c no, this is not a good statistical question because there are not a variety of answers that could be given. no, this is not a good statistical question because there are a variety of answers that could be given