Exam 18: A Roadmap for Analyzing Data

Are Japanese managers more motivated than American managers? A randomly selected group of 100 managers from each group were administered the Sarnoff Survey of Attitudes Toward Life (SSATL), which measures motivation for upward mobility.The mean and standard deviation of The SSATL scores are computed.The standard deviations of the SSATL scores suggest that the Standard deviation from the two groups is very different.Which of the following tests will be the Most appropriate?

Four surgical procedures currently are used to install pacemakers.If the patient does not need to Return for follow-up surgery, the operation is called a "clear" operation.A heart center wants to Compare the 4 procedures, and collects the following numbers of patients from their own records: Which of the following tests will be the most appropriate to find out which of the 4 procedures is The most effective?

An economist is interested to see how consumption for an economy (in $ billions)is influenced By gross domestic product ($ billions)and aggregate price (consumer price index).Annual data From 30 years were collected.Which of the following would be the most appropriate analysis to Perform?

Suppose that past history shows that 60% of college students prefer Coca-Cola.A sample of 10 Students is to be selected.Which of the following distributions would you use to figure out the Probability that at least half of them will prefer Coca-Cola?

The weight of a randomly selected cookie from a production line can most likely be modeled by Which of the following distributions?

True or False: At a meeting of information systems officers for regional offices of a national company, a survey was taken to determine the number of employees the officers supervise in the operation of their departments, where X is the number of employees overseen by each information systems officer.A stem-and-leaf display can be used to present this information.

To test the effectiveness of a business school preparation course, 8 students took a general Business test before and after the course.Suppose the before and after exam scores are both Normally distributed.Which of the following tests will be the most appropriate?

SCENARIO 18-6 -Referring to Scenario 18-6, in terms of the s in the model, give the mean change in weight- Loss (Y)for every 1 month increase in time in the program When attending the afternoon Session.

SCENARIO 18-2 -Referring to Scenario 18-2, what can we say about Model 1?

Every spring semester, the School of Business coordinates with local business leaders a luncheon For graduating seniors, their families, and friends.Corporate sponsorship pays for the lunches of Each of the seniors, but students have to purchase tickets to cover the cost of lunches served to Guests they bring with them.Data on the number of guests each graduating senior invited to the Luncheon from 500 graduating seniors last year were collected.Based on this information, which Of the following will you construct to learn about the percentage of seniors who will bring at Least one guest to a luncheon?

SCENARIO 18-2 -Referring to Scenario 18-2, the estimated value of the partial regression parameter in Model 1 means that

SCENARIO 18-4 You decide to predict gasoline prices in different cities and towns in the United States for your term project.Your dependent variable is price of gasoline per gallon and your explanatory variables are per capita income, the number of firms that manufacture automobile parts in and around the city, the number of new business starts in the last year, population density of the city, percentage of local taxes on gasoline, and the number of people using public transportation.You collected data of 32 cities and obtained a regression sum of squares SSR= 122.8821.Your computed value of standard error of the estimate is 1.9549. -Referring to Scenario 18-4, what is the value of the coefficient of multiple determination?

Suppose the light bulbs in a factory burn out at a rate of 50 bulbs per month.Which of the Following distributions would you use to determine the probability that the next two light bulbs Will burn out 2 days apart?

SCENARIO 18-9 What are the factors that determine the acceleration time (in sec.)from 0 to 60 miles per hour of a car? Data on the following variables for 171 different vehicle models were collected: Accel Time: Acceleration time in sec. Cargo Vol: Cargo volume in cu.ft. HP: Horsepower MPG: Miles per gallon SUV: 1 if the vehicle model is an SUV with Coupe as the base when SUV and Sedan are both 0 Sedan: 1 if the vehicle model is a sedan with Coupe as the base when SUV and Sedan are both 0 The regression results using acceleration time as the dependent variable and the remaining variables as the independent variables are presented below. The various residual plots are as shown below. A Roadmap for Analyzing Data 18-63 18-64 A Roadmap for Analyzing Data -True or False: Referring to Scenario 18-9, the 0 to 60 miles per hour acceleration time of an SUV is predicted to be 0.1252 seconds higher than that of a sedan.

SCENARIO 18-6 -Referring to Scenario 18-6, which of the following statements is supported by the analysis Shown?

An agronomist wants to compare the crop yield of 3 varieties of chickpea seeds.She plants all 3 Varieties of the seeds on each of 5 different patches of fields.She then measures the crop yield in Bushels per acre.Which of the following tests will be the most appropriate to find out if the Different patches is advantageous in reducing the random error?

Data on the amount of money made in a year by 1,000 families in a small town were collected. You want to know if the money made is normally distributed.Which of the following would you Use?

SCENARIO 18-3 -Referring to Scenario 18-3, the estimate of the unit change in the mean of Y per unit change in , taking into account the effects of the other 3 variables, is ________.

The Tampa International Airport (TIA)has been criticized for the waiting times associated with Departing flights.While the critics acknowledge that many flights have little or no waiting times, Their complaints deal more specifically with the longer waits attributed to some flights.The Critics are interested in showing, mathematically, exactly what the problems are.Which type of Distribution would best model the waiting times of the departing flights at TIA?

SCENARIO 18-6 -