Exam 25: Exploring and Collecting Data

Use the following to answer the question(s) below. 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?

An office supply chain has stores in two locations, Toronto and Vancouver. One of these stores is to be closed within the coming year, and to help make the decision, management reviews sales data. Below are boxplots for monthly unit sales for both locations. Which of the following statements is not correct?

If a parameter is computed from a set of data, which of the following statements is true?

Use the following to answer the question(s) below. Below is Excel output showing the coefficient of correlation between personal income and vacation expenses (both in $thousands) for a large sample of clients of one travel agency in Toronto. -What percent of the variation of vacation expenses can be explained by variation of personal income?

Use the following to answer the question(s) below. 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?

In listing a property, real estate agencies provides information on a number of variables. Which of the following variables related to property listings is categorical?

Use the following to answer the question(s) below. A consumer magazine evaluated the price and performance of 23 models of cordless phones. Computer output gives this summary for the prices ($): -The IQR for these data is

Use the following to answer the question(s) below. 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?

Use the following to answer the question(s) below. Summary statistics and a histogram for certain data are shown below. -What is the most appropriate measure to describe the centre of these data?

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

Use the following to answer the question(s) below. A manager of Kim & Lim corporate strategy department thinks that dollars spent on advertising can to some extent be a predictor of total sales dollars. As an aid in long-term planning, she analyzes the following sales and advertising numbers for 2015 (both in $millions). Information was collected from eight companies of Kim & Lim. -Use the following regression equation Total Sales = -35.017 + 15.148 Advertising To express statistical dependence of total sales on advertising expenses in the given sample (both numbers in $millions). A company with $5,900,000 advertising expenses is expected to have total sales of

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

Suppose a sample of 60 crates has a mean weight of 12.1 kilograms and a standard deviation of 0.05 kilograms. If a crate has the weight of 12 kilograms, what is its corresponding z-score?

Use the following to answer the question(s) below. 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 true about the distributions of EPS for retail and energy stocks?

Below is a stem-and-leaf display of prices for a sample of homes recently sold in a metropolitan area in Canada. Which of the following statements is true?

Use the following to answer the question(s) below. 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?

Use the following to answer the question(s) below. 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?

Which is true of the data shown in the histogram?

What type of variable is the style of a home (bungalow, split level, ranch, etc.)?

Use the following to answer the question(s) below. Summary statistics and a histogram for certain data are shown below. -The IQR for these data is