Chapter 1 Quiz and Study Guide

Question 1

In __________ we select elements because they are easy to sample.
a. random sampling
b. convenience sampling
c. judgement sampling
d. probability sampling

Answer 1

b. convenience sampling

Question 2

___________ sampling is where we know the chance that each element will be included in the sample, which allows us to make statistical inferences about the sample population.
a. convenience
b. judgement
c. voluntary
d. probability

Answer 2

d. probability

Question 3

Transactional data are now used by businesses as a part of:
a. survey analysis
b. big data
c. descriptive statistics
d. experimental studies

Answer 3

b. big data

Question 4

Which of the following is a type of question used in survey research?
a. dichotomous
b. open-ended
c. multiple choice
d. All of the above

Answer 4

d. All of the above

Question 5

A Yes or No question is:
a. dichotomous
b. evaluative
c. open-ended
d. systematic

Answer 5

a. dichotomous

Question 6

___________ is the difference between a numerical descriptor of the population and the corresponding descriptor of the sample.
a. no observation error
b. sampling error
c. observation error
d. nonresponse

Answer 6

b. sampling error

Question 7

Data that are collected by an individual through personally planned experimentation or observation are:
a. secondary data
b. quantitative data
c. primary data
d. variables

Answer 7

c. primary data

Question 8

Which of the following is a quantitative variable:
a. the manufacturer of a cell phone
b. a person’s gender
c. mileage of a car
d. whether a person is a college graduate

Answer 8

c. mileage of a car

Question 9

A sequence of operations that takes inputs and turns them into outputs is a ___________.
a. statistical inference
b. process
c. runs plot
d. random sampling

Answer 9

b. process

Question 10

One method of being sure a sample being studied can be used to make statistical inferences about the population is to select a:
a. judgement sample
b. voluntary sample
c. convenience sample
d. probability sample

Answer 10

d. probability sample

Question 11

A restaurant leaves comment cards on all of its tables and encourages customers to participate in a brief survey to learn about their overall experience. What kind of sampling is this?

Answer 11

convenience

Question 12

A quality control worker at a factory selects the first 10 items she sees as her sample for the day. What kind of sampling is this?

Answer 12

convenience

Question 13

A population that consists of all the customers who will use the drive-thru of the local fast food restaurant is called a(n):
a. finite population
b. infinite population
c. random sample population
d. statistical population

Answer 13

a. finite population (you can count how many customers came to drive-thru)

Question 14

__________ uses traditional or newer graphics to present visual summaries of business information.
a. nonparametric predictive analytics
b. parametric predictive analytics
c. prescriptive analytics
d. graphical descriptive analytics

Answer 14

d. graphical descriptive analytics

Question 15

Which of the following is not a supervised learning technique in predictive analytics?
a. linear regression
b. factor analysis
c. decision trees
d. neural networks

Answer 15

b. factor analysis

Question 16

Non-overlapping groups of similar elements in a population are called:
a. clusters
b. frames
c. strata
d. stages

Answer 16

c. strata

Question 17

An identification of police officers by rank would represent a(n) _________ level of measurement.
a. nominative
b. ordinal
c. interval
d. ratio

Answer 17

b. ordinal

Question 18

You want to select a sample of 100 employees of Company X. You assign a number to every employee in the company database from 1 to 1000and use a random number generator to select 100 numbers. Which type of sample would this be?
a. cluster random sample
b. simple random sample
c. stratified random sample
d. analytics random sample

Answer 18

b. simple random sample

Question 19

All employees of the company are listed in alphabetical order. From the first 10 numbers, you randomly select a starting point: number 6. From number 6 onwards, every 10th person on the list is selected (6,16 ,26 , 36, etc.) and you end up with a sample of 100 people. What type of sample would this be?
a. cluster random sample
b. systematic sampling
c. stratified random sample
d. analytics random sample

Answer 19

b. systematic sampling

Question 20

The company has 800 female employees and 200 male employees. You want to ensure that the sample reflects the gender balance of the company, so you sort the population into two strata based on gender. Then you use random sampling on each group, selecting 80 women and 20 men, which gives you a representative sample of 100 people.What type of sample would this be?
a. cluster random sample
b. analytics random sample
c. systematic sampling
d. stratified sampling

Answer 20

d. stratified sampling