Exam 26: Exploring and Collecting Data

In 2002 data were collected on the percent of people in the U.S. not covered by Health insurance. Summary statistics and a histogram for these data are shown below. The IQR for these data is Min Q1 Median Q3 Max Mean SD 7.9 10.8 13.4 16.7 25.8 13.9 3.6

A manufacturer of cable wire periodically selects samples to monitor the process. A sample of ten wires is selected and the diameters (in cm.) are 0.493, 0.534, 0.527,0.511, 0.565, 0.559, 0.519, 0.562, 0.551, and 0.530. The mean diameter is

Boxplots of earnings per share (EPS) data for a sample of retail company stocks And a sample of energy company stocks are shown below. Which of the following Statements is correct?

Real estate agencies also keep track of housing prices in a given area. Suppose They also provide their clients with quarterly median selling prices for homes in a given Area for the past three year period. These data are

A magazine that publishes product reviews conducted a survey of teenagers' Preferences for cell phones. Three brands of cell phone designed specifically with teens In mind were the focus of the study. The table summarizes responses by brand and Gender. What percent of teenagers preferred LG Rumor? Cell Phone Male Female LG Rumor 55 87 Sidekick LX 99 150 BlackJack II 196 113

A customer service center keeps track of the number of complaints received each Day about one of their new products. The numbers of complaints received over the last 11 day period are 19, 18, 22, 21, 17, 18, 22, 19, 16, 23, and 25. The IQR for this sample Of data is

A government agency has 6000 employees. As an alternative to the traditional Five day work week, employees were asked whether they preferred a four day work week (10 hours per day) or flexible hours. The table below shows the results by age category. The most appropriate display for these data is a Age Category Prefers 4 Day Week Prefers Flex Hours Under 30 600 300 30-45 1200 1500 Over 45 2100 300

What scale of measurement is the style of a home (colonial, split level, ranch etc)?

A recent survey of online shoppers asked them to indicate the primary reason they Shop via the Internet. The table summarizes responses by reason and gender. What Percent of respondents cite Convenience as the primary reason they shop online? Reason for Shopping Online Male Female Convenience 249 90 Better Prices 110 99 Greater Selection 41 211

A magazine that publishes product reviews conducted a survey of teenagers' Preferences for cell phones. Three brands of cell phone designed specifically with teens In mind were the focus of the study. The table summarizes responses by brand and Gender. What percent of teenagers who preferred the BlackJack II were males? Cell Phone Male Female LG Rumor 55 87 Sidekick LX 99 150 BlackJack II 196 113

A customer service center keeps track of the number of complaints received each Day about one of their new products. The numbers of complaints received over the last 11 day period are 19, 18, 22, 21, 17, 18, 22, 19, 16, 23, and 25. The standard deviation For this sample of data is

Suppose a sample of 60 cans of soda has a mean of 12.1 ounces and a standard Deviation of 0.05 ounces. If a can of soda has 12 ounces, what is its corresponding z Score?

A manufacturer of cable wire periodically selects samples to monitor the process. A sample of ten wires is selected and the diameters (in cm.) are 0.493, 0.534, 0.527,0.511, 0.565, 0.559, 0.519, 0.562, 0.551, and 0.530. The standard deviation is

A magazine that publishes product reviews conducted a survey of teenagers' Preferences for cell phones. Three brands of cell phone designed specifically with teens In mind were the focus of the study. The table summarizes responses by brand and Gender. Which of the following charts would be appropriate for displaying the marginal Distribution of brands? Cell Phone Male Female LG Rumor 55 87 Sidekick LX 99 150 BlackJack II 196 113

An advocacy group is investigating whether gender has an effect on job category In large investment firms. She surveyed a sample of firms with the results shown below. The most appropriate display for these data is a Job Category Male Female Clerical / Technical 85 215 Professional Staff 720 480 Executive / Managerial 400 100

A magazine that publishes product reviews conducted a survey of teenagers' Preferences for cell phones. Three brands of cell phone designed specifically with teens In mind were the focus of the study. The table summarizes responses by brand and Gender. What percent of female teenagers preferred the Sidekick LX? Cell Phone Male Female LG Rumor 55 87 Sidekick LX 99 150 BlackJack II 196 113

The U.S. Bureau of Labor Statistics (BLS) compiles data on a number of Variables. Which of the following BLS variables is categorical?

Boxplots of earnings per share (EPS) data for a sample of retail company stocks And a sample of energy company stocks are shown below. Which of the following Statement is true about the distributions of EPS for retail and energy stocks?

In 2002 data were collected on the percent of people in the U.S. not covered by Health insurance. Summary statistics and a histogram for these data are shown below. What is the most appropriate measure to describe the center of these data? Min Q1 Median Q3 Max Mean SD 7.9 10.8 13.4 16.7 25.8 13.9 3.6

A researcher is conducting a study on eating disorders. Using a list of recent Participants in the online Weight Watchers program, she randomly selects a name from The alphabetized list. She then chooses every tenth person from that point on to include In her study. This sampling strategy is called