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Chapter 7: Q. 12 (page 463)

Here is a dot plot of the adult literacy rates in 177countries in 2008, according to the United Nations. For example, the lowest literacy rate was 23.6%, in the African country of Burkina Faso. Use the dot-plot below to answer the Question

The mean of this distribution (don’t try to find it) will be

(a) very close to the mode.

(b) greater than the median.

(c) less than the median.

(d) You can’t say, because the median is random.

(e) You can’t say, because the mean is random.

Short Answer

Expert verified

The mean of this distribution will be option (c) less than the median.

Step by step solution

01

Given information

Dot plot of the adult literacy rates in 177countries in2008

The lowest literacy rate is23.6%

02

Explanation

This inquiry inquires about the mean and its relationship to the median.

This is a simple question if you remember that outliers have a greater impact on the mean than on the median.

When there is a left skew, the outliers push the mean to the left of the median.

The mean is dragged more to the right than the median when there is a right skew.

Since skewed left, the mean is dragged to the left than the median therefore the answer is (c) less than the median.

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Most popular questions from this chapter

You work for an advertising agency that is preparing a new television commercial to appeal to women. You have been asked to design an experiment to compare the effectiveness of three versions of the commercial. Each subject will be shown one of the three versions and then asked about her attitude toward the product. You think there may be large differences between women who are employed and those who are not. Because of these differences, you should use

(a) a block design, but not a matched pairs design

(b) a completely randomized design.

(c) a matched pairs design.

(d) a simple random sample.

(e) a stratified random sample.

When people order books from a popular online source, they are shipped in standard-sized boxes. Suppose that the mean weight of the boxes is1.5pounds with a standard deviation of 0.3pounds, the mean weight of the packing material is 0.5pounds with a standard deviation of 0.1 pounds, and the mean weight of the books shipped is12 pounds with a
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(a)1.84
(b) 2.60

(c) 3.02

(d) 3.40

(e)9.10

3. Describe the shape of the

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