Exam 6: Scatterplots, Association, and Correlation

Consider the following to answer the question(s) below: A consumer research group investigating the relationship between the price of meat (per pound) and the fat content (grams) gathered data that produced the following scatterplot. -If the point in the lower left hand corner ($2.00 per kilogram, 6 grams of fat) were removed, the correlation would most likely

If the correlation between two variables is determined to be 0.70, which of the following is known to be true?

For each of the following scenarios, indicate which is the predictor variable and which is the response variable. a. A study examined consumption levels of oil and carbon dioxide emissions for a sample of counties. b. Data were collected on job performance rating and hours of training for a sample of employees at a telecommunications repair facility. c. Salary data as well as years of managerial experience were collected for a sample of executives in the high tech industry.

Consider the following to answer the question(s) below: The following scatterplot shows monthly sales figures (in units) and the number of months of experience on the job for a sample of 18 salespeople. -The correlation between monthly sales and number of months of experience is most likely

In analyzing the relationship between two variables, a scatter plot can be used to detect which of the following?

The correlation associated with the following scatterplot is

In discussing how its customers use online services, a bank manager noted "there seems to be a strong correlation between the use of the online bill paying feature and gender." Comment on this statement.

If a pair of variables have a curvilinear relationship, which of the following is true?

A study was done in which the daily temperature and the number of traffic accidents within the city were recorded. The standard deviations for the samples are 13.13 for temperature and 2.55 for accidents. These sample data are shown as follows: Given these data, the sample correlation is approximately

For each of the following scenarios, indicate which is the predictor variable and which is the response variable. a. A supermarket chain gathers data on the amount they spend on promotional material (specials, coupons, etc.) and sales revenue generated each quarter. b. Government sponsored research investigated the relationship between the number of hours individuals spend on the Internet and age. c. A real estate association conducted a study on home prices and economic strength for different regions of Canada.

Based on the scatterplots shown below, describe the association between x and y. a. b.

Government sponsored research investigated the relationship between the number of hours individuals spend on the Internet and age. Which of the following statements is true?