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Chapter 2: Q. 79 (page 145)

Use the following information to answer the next two exercises: Suppose one hundred eleven people who shopped in a special t-shirt store were asked the number of t-shirts they own costing more than \(19each.

The percentage of people who own at most three t-shirts costing more than \)19each is approximately:

a.21b.59c.41d.Cannotbedetermined

Short Answer

Expert verified

The correct option is c. 41 .

Step by step solution

01

Given information

We are given the below histogram:

02

Calculation 

There are 5people who possess a 1T-shirt, 17people who own a 17T-shirt, and 23people who own three t-shirts, according to the histogram. The study has a total of 111participants.

The following formula is used to calculate the percentage of people who own at least three t-shirts that cost more than $19:

5+17+23111脳100%=45111脳100%鈮�41%

As a result, c. 41 is the best choice.

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Most popular questions from this chapter

Javier and Ercilia are supervisors at a shopping mall. Each was given the task of estimating the mean distance that shoppers live from the mall. They each randomly surveyed 100shoppers. The samples yielded the following information.

a. How can you determine which survey was correct ?

b. Explain what the difference in the results of the surveys implies about the data.

c. If the two histograms depict the distribution of values for each supervisor, which one depicts Ercilia's sample? How do you know?

d. If the two box plots depict the distribution of values for each supervisor, which one depicts Ercilia鈥檚 sample? How do you know?

Use the following information to answer the next three exercises: We are interested in the number of years students in a particular elementary statistics class have lived in California. The information in the following table is from the entire section.

Following are the published weights (in pounds) of all of the team members of the San Francisco 49ersfrom a previous year.

role="math" localid="1648013012857" 177;205;210;210;232;205;185;185;178;210;206;212;184;174;185;242;188;212;215;247;241;223;220;260;245;259;278;270;280;295;275;285;290;272;273;280;285;286;200;215;185;230;250;241;190;260;250;302;265;290;276;228;265

a. Organize the data from smallest to largest value.

b. Find the median.

c. Find the first quartile.

d. Find the third quartile.

e. Construct a box plot of the data.

f. The middle 50%of the weights are from _______ to _______.

g. If our population were all professional football players, would the above data be a sample of weights or the population of weights? Why?

h. If our population included every team member who ever played for the San Francisco 49ers, would the above data

be a sample of weights or the population of weights? Why?

i. Assume the population was the San Francisco 49ers. Find:

i. the population mean, 渭.

ii. the population standard deviation, 蟽.

iii. the weight that is two standard deviations below the mean.

iv. When Steve Young, quarterback, played football, he weighed 205pounds. How many standard deviations above or below the mean was he?

j. That same year, the mean weight for the Dallas Cowboys was 240.08pounds with a standard deviation of 44.38pounds. Emmit Smith weighed in at 209pounds. With respect to his team, who was lighter, Smith or Young? How did you determine your answer?

The population in Park City is made up of children, working-age adults, and retirees. Table 2.10shows the three age groups, the number of people in the town from each age group, and the proportion (%) of people in each age group. Construct a bar graph showing the proportions.

Describe the relationship between the mode and the median of this distribution.

Using the data from Mrs. Ramirez鈥檚 math class supplied in Exercise 2.8, construct a bar graph showing the percentages
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