BUSA 2850 Chapter 1 HW

A poll solicits a large number of college undergraduates for information on the following variables: the name of their cell phone provider (AT&T, Verizon, and so on), the numbers of minutes used last month (200, 400, for example), and their satisfaction with the service (Terrible, Adequate, Excellent, and so forth). What is the level of measurement for each of these three variables? 1. The cell phone provider 2. The number of minutes used 3. Satisfaction with the service

1. Nominal 2. Ratio 3. Ordinal

Explain the difference between a sample and a population.

A SAMPLE is a subset taken from a POPULATION

AVX Home Entertainment Inc recently began a "no-hassles" return policy. A sample of 320 customers who recently returned items showed 120 thought the policy was fair, 170 thought it took too long to complete the transaction, and the rest had no opinion. On the basis of this information, make an inference about customer reaction to the new policy. (Round your answers to 1 decimal place.) The above data suggest that majority of the customers

Customer Reaction Fair 37.5% Too long 53.1% No opinion 9.4% believe it took too long to complete the transaction

Explain the difference between a discrete and a continuous variable.

Discrete variables can assume ONLY CERTAIN VALUES, but continuous variables can assume ANY VALUES within some range.

MarkLines is an online portal (www.marklines.com) that reports automotive industry data. The table below shows the number of cars sold in the United States from January to November in 2017 and 2018. The top 22 manufacturers, plus others, are listed here. Sales data often is reported in this way to compare current sales to last year's sales. a. Using computer software, compare 2017 sales to the 2018 sales for each manufacturer by computing the difference. Make a list of the manufacturers that increased sales compared to 2017; make a list of manufacturers that decreased sales. Which manufacturers are in the top five with increased sales? Which manufacturers are in the bottom five with decreased sales? (Enter values in decreasing order and negative values with a minus sign.)

Top five Manufacturer Fiat Chrysler 151,254 Tesla (Est.) 65,730 Subaru 30,980 Volvo 17,609 Land Rover 14,767 Bottom five Manufacturer Mercedes (includes Sprinter) -14,978 GM (Est.) -36,925 Honda -42,399 Ford -68,700 Nissan -110,081

b. Using computer software, compare 2017 sales to 2018 sales for each manufacturer by computing the percentage change in sales. Make a list of the manufacturers in order of increasing percentage changes. Which manufacturers are in the top five in percentage change? Which manufacturers are in the bottom five in percentage change? (Enter values in decreasing order and negative values with a minus sign. Round percentage answers to 1 decimal place.)

Top five Manufacturer Tesla (Est.) 163.0% Volvo 24.5% Land Rover 22.1% Mitsubishi 14.6% Fiat Chrysler 8.0% Bottom five Manufacturer Mercedes (includes Sprinter) -4.5% Nissan -7.6% Others -8.7% Jaguar -25.3% Smart -60.3%

Exits along interstate highways were formerly numbered successively from the western or southern border of a state. However, the Department of Transportation changed most of them to agree with the numbers on the mile markers along the highway. a. What level of measurement were data on the consecutive exit numbers? b. What level of measurement are data on the milepost numbers? c. The newer system provided information on the distance between exits.

a. Ordinal b. Ratio c. True

For the following situations, would you collect information using a sample or a population? a. Statistics 201 is a course taught at a university. Professor Rauch has taught nearly 1,500 students in the course over the past 5 years. You would like to know the average grade for the course. b. As part of a research project, you need to report the average profit as a percentage of revenue for the #1-ranked corporation in the Fortune 500 for each of the last 10 years. c. You are looking forward to graduation and your first job as a salesperson for one of five large pharmaceutical corporations. Planning for your interviews, you will need to know about each company's mission, profitability, products, and markets. d. You are shopping for a new digital music player such as the Apple iPod. You would like to estimate the typical amount of memory for a digital music player.

a. Population b. Population c. Population d. Sample

Slate is a daily magazine on the Web. Its business activities can be described by a number of variables. What is the level of measurement for each of the following variables? a. The number of hits on their website on Saturday between 8:00 a.m. and 9:00 a.m. b. The departments, such as food and drink, politics, foreign policy, sports, etc. c. The number of weekly hits on the Sam's Club ad. d. The number of years each employee has been employed with Slate.

a. Ratio b. Nominal c. Ratio d. Ratio

For each of the following, determine whether the group is a sample or a population. a. The participants in a study of a new cholesterol drug. b. The drivers who received a speeding ticket in Kansas City last month. c. People on welfare in Cook County (Chicago), Illinois. d. The 30 stocks that make up the Dow Jones Industrial Average.

a. Sample b. Population c. Population d. Sample

For the following situations, would you collect information using a sample or a population? a. To compare the salary of software and hardware technicians in Washington. b. To find the number of countries in the world with nuclear weapons. c. To find the percentage of users of a soap that a company manufactures. d. To find how many students in a particular class of a college in New York own PCs.

a. Sample b. Population c. Sample d. Population