Sampling Methods

Question 1

What does mean absolute deviation (MAD) measure? Explain how to find the MAD for a set of data.

Revolt · Accepted Answer

The MAD measures the average distance from a data point from the mean. To find the MAD for a set of data, first find the mean of the data set. Then, find the distance from the mean for each data value. Finally, find the mean of those distances.

Question 2

What information did you include in your response? Check all that apply.

Revolt · Accepted Answer

The MAD is a measure of variability.; Find the mean of the data set.; Find the distance from the mean for each data value.; Find the means of the distances.

Question 3

A student found the MAD of the data shown. What was the student’s error?

Revolt · Accepted Answer

When calculating the distances to the mean, the student forgot to take the absolute values.

Question 4

Find the mean of the data set shown below. Round to the nearest tenth, if necessary.This Week’s High Temperatures (°F)29, 38, 45, 31, 50, 58, 62

Revolt · Accepted Answer

PENDING

Question 5

x = -0.3✔ 0.32.311.3

Revolt · Accepted Answer

0.3; Selection 1: 0.3; Selection 2: 5.3; Selection 3: 17.3

Question 6

y = -2.72.7✔ 5.313.3

Revolt · Accepted Answer

5.3

Question 7

z = 0.36.313.3✔ 17.3

Revolt · Accepted Answer

17.3

Question 8

Question 17

Revolt · Accepted Answer

PENDING

Question 9

Which measures of center and variability for the temperatures were lower this week than last week? Check all that apply.

Revolt · Accepted Answer

mean; range; mean absolute deviation

Question 10

What is the mean of the data set? 78✔ 78.837984

Revolt · Accepted Answer

78.83; Selection 1: 78.83; Selection 2: 2.4

Sampling Methods Answers

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