Business Stats

The jersey numbers of a sorority soccer team.

nominal

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. c. The newer system provided information on the distance between exits.

true

AVX Home Entertainment Inc recently began a "no-hassles" return policy. A sample of 315 customers who recently returned items showed 130 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. No opinion?

4.8

AVX Home Entertainment Inc recently began a "no-hassles" return policy. A sample of 315 customers who recently returned items showed 130 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. Fair percentage?

41.3

AVX Home Entertainment Inc recently began a "no-hassles" return policy. A sample of 315 customers who recently returned items showed 130 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. Too long percentage?

54

Explain the difference between a discrete and a continuous variable.

Discrete variables can assume 'only certain values', but continuous variable can assume 'any values' within some range

Explain the difference between qualitative and quantitative variables.

Qualitative data is 'not numerical', whereas quantitative data is 'numerical'

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.

population

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 315 customers who recently returned items showed 130 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. The data suggests that majority of the customers...?

believe it took too long to complete the transaction

Student IQ ratings.

interval

A student's state of birth.

nominal

The departments, such as food and drink, politics, foreign policy, sports, etc.

nominal

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?

nominal; ratio; ordinal

A student's academic class—that is, freshman, sophomore, junior, or senior.

ordinal

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?

ordinal

Classify the following as a population or sample: b. All of the people that attended a movie at the local theater last month.

population

For the following situations, would you collect information using a sample or a population? 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.

population

For the following situations, would you collect information using a sample or a population? 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.

population

People on welfare in Cook County (Chicago), Illinois.

population

The drivers who received a speeding ticket in Kansas City last month.

population

Distance students travel to class.

ratio

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. b. What level of measurement are data on the milepost numbers?

ratio

Number of hours students study per week.

ratio

The number of hits on their website on Saturday between 8:00 a.m. and 9:00 a.m.

ratio

The number of weekly hits on the Sam's Club ad.

ratio

The number of years each employee has been employed with Slate.

ratio

Classify the following as a population or sample: a. Two chimpanzees chosen to carry out genetic research.

sample

For the following situations, would you collect information using a sample or a population? 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.

sample

The 30 stocks that make up the Dow Jones Industrial Average.

sample

The participants in a study of a new cholesterol drug.

sample