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Chapter 2: Q. 50 (page 134)

Use the following information to answer the next three exercises: State whether the data are symmetrical, skewed to the left, or skewed to the right.

16;17;19;22;22;22;22;22;23

Short Answer

Expert verified

The data is skewed to the right.

Step by step solution

01

Given information 

The data given is:

16;17;19;22;22;22;22;22;23

02

Explanation 

The plot of the data is

Since the data has the highest frequency at 22which is the right side of the graph. Also, the beside bars are less than the highest bar. We can say the graph is skewed to the right.

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Most popular questions from this chapter

The following data show the different types of pet food stores in the area carry. 6;6;6;6;7;7;7;7;7;8;9;9;9;9;10;10;10;10;10;11;11;11;11;12;12;12;12;12;12; Calculate the sample mean and the sample standard deviation to one decimal place using a TI-83+orTI-84 calculator.

In a survey, 40people were asked how many times they visited a store before making a major purchase. The results are shown in Table 2.37.

Refer toFigure2.50determine which of the following are true and which are false. Explain your solution to each part in complete sentences.


a. The medians for all three graphs are the same.

b. We cannot determine if any of the means for the three graphs is different.

c. The standard deviation for graph b is larger than the standard deviation for graph a.

d. We cannot determine if any of the third quartiles for the three graphs is different.

A music school has budgeted to purchase three musical instruments. They plan to purchase a piano costing 3,000, a guitar costing 550, and a drum set costing 600. The mean cost for a piano is 4,000 with a standard deviation of 2,500. The mean cost for a guitar is 500 with a standard deviation of 200. The mean cost for drums is 700 with a standard deviation of 100. Which cost is the lowest, when compared to other instruments of the same type? Which cost is the highest when compared to other instruments of the same type. Justify your answer.

The following data are the shoe sizes of 50male students. The sizes are continuous data since shoe size is measured. Construct a histogram and calculate the width of each bar or class interval. Suppose you choose six bars.

9;9;9.5;9.5;10;10;10;10;10;10;10.5;10.5;10.5;10.5;10.5;10.5;10.5;10.511;11;11;11;11;11;11;11;11;11;11;11;11;11.5;11.5;11.5;11.5;11.5;11.5;11.512;12;12;12;12;12;12;12.5;12.5;12.5;12.5;14
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