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