Question 1

Goals scored in a soccer game is an example of

Accepted Answer

A)  a categorical variable. 
B)  a quantitative variable. 
C)  either a quantitative or categorical variable. 
D)  neither a quantitative nor categorical variable. 
A)  a categorical variable. 
B)  a quantitative variable. 
C)  either a quantitative or categorical variable. 
D)  neither a quantitative nor categorical variable. B

Question 2

The number observations in a complete data set having 15 elements and 5 variables is

Accepted Answer

A)  5. 
B)  10. 
C)  15. 
D)  75. 
A)  5. 
B)  10. 
C)  15. 
D)  75. B

Question 3

Data measured a nominal scale

Accepted Answer

A)  must be alphabetic. 
B)  can be either numeric or nonnumeric. 
C)  must be numeric. 
D)  must rank order the data. 
A)  must be alphabetic. 
B)  can be either numeric or nonnumeric. 
C)  must be numeric. 
D)  must rank order the data. B

Question 4

The scale of measurement that is used to rank order the observation for a variable is called the _____ scale.

Accepted Answer

A)  ratio 
B)  ordinal 
C)  nominal 
D)  interval 
A)  ratio 
B)  ordinal 
C)  nominal 
D)  interval

Question 5

Categorical data

Accepted Answer

A)  must be numeric. 
B)  must be nonnumeric. 
C)  cannot be numeric. 
D)  may be either numeric or nonnumeric. 
A)  must be numeric. 
B)  must be nonnumeric. 
C)  cannot be numeric. 
D)  may be either numeric or nonnumeric.

Question 6

In a questionnaire, respondents are asked to mark their gender as male or female. The scale of measurement for gender is _____ scale.

Accepted Answer

A)  ordinal 
B)  nominal 
C)  ratio 
D)  interval 
A)  ordinal 
B)  nominal 
C)  ratio 
D)  interval

Question 7

Since a sample is a subset of the population, the sample mean _____ the mean of the population.

Accepted Answer

A)  is always smaller than 
B)  is always larger than 
C)  must be equal to 
D)  varies around 
A)  is always smaller than 
B)  is always larger than 
C)  must be equal to 
D)  varies around

Question 8

The numbers on football jerseys are an example of _____ data.

Accepted Answer

A)  categorical 
B)  either categorical or quantitative 
C)  neither categorical or quantitative 
D)  quantitative 
A)  categorical 
B)  either categorical or quantitative 
C)  neither categorical or quantitative 
D)  quantitative

Question 9

The set of measurements collected for a particular element are called

Accepted Answer

A)  variables. 
B)  observations. 
C)  samples. 
D)  populations. 
A)  variables. 
B)  observations. 
C)  samples. 
D)  populations.

Question 10

In a sample of 1,600 registered voters, 912 or 57% approve of the way the President is doing his job. The 57% approval is an example of

Accepted Answer

A)  a sample. 
B)  descriptive statistics. 
C)  statistical inference. 
D)  a population. 
A)  a sample. 
B)  descriptive statistics. 
C)  statistical inference. 
D)  a population.

Question 11

Arithmetic operations are inappropriate for

Accepted Answer

A)  categorical data. 
B)  quantitative data. 
C)  both categorical and quantitative data. 
D)  large data sets. 
A)  categorical data. 
B)  quantitative data. 
C)  both categorical and quantitative data. 
D)  large data sets.

Question 12

Dr. Kurt Thearling, a leading practitioner in the field, defines data mining as "the _____ extraction of _____ information from databases."

Accepted Answer

A)  thorough, insightful 
B)  timely, accurate 
C)  automated, predictive 
D)  intentional, useful 
A)  thorough, insightful 
B)  timely, accurate 
C)  automated, predictive 
D)  intentional, useful

Question 13

A statistics professor asked students in a class their ages. Based on this information, the professor states that the average age of all the students in the university is 24 years. This is an example of

Accepted Answer

A)  an observational study. 
B)  descriptive statistics. 
C)  an experiment. 
D)  statistical inference. 
A)  an observational study. 
B)  descriptive statistics. 
C)  an experiment. 
D)  statistical inference.

Question 14

In a post office, the mailboxes are numbered from 1 to 4,500. These numbers represent

Accepted Answer

A)  categorical data. 
B)  quantitative data. 
C)  either categorical or quantitative data. 
D)  since the numbers are sequential, the data is quantitative. 
A)  categorical data. 
B)  quantitative data. 
C)  either categorical or quantitative data. 
D)  since the numbers are sequential, the data is quantitative.

Question 15

The type of analytics whose models yield a best course of action to take is _____ analytics.

Accepted Answer

A)  descriptive 
B)  prescriptive 
C)  predictive 
D)  inferential 
A)  descriptive 
B)  prescriptive 
C)  predictive 
D)  inferential

Question 16

Which of the following is a categorical variable?

Accepted Answer

A)  Your age when you began college 
B)  Your Social Security Number 
C)  Your statistics class start time 
D)  Your birth year 
A)  Your age when you began college 
B)  Your Social Security Number 
C)  Your statistics class start time 
D)  Your birth year

Question 17

Statistical studies in which researchers control variables of interest are _____ studies.

Accepted Answer

A)  experimental 
B)  random variable 
C)  inferential 
D)  observational 
A)  experimental 
B)  random variable 
C)  inferential 
D)  observational

Question 18

In a random sample of 200 items, 5 items were defective. An estimate of the percentage of defective items in the population is

Accepted Answer

A)  5%. 
B)  2.5%. 
C)  20%. 
D)  10%. 
A)  5%. 
B)  2.5%. 
C)  20%. 
D)  10%.

Question 19

Data collected over several time periods are _____ data.

Accepted Answer

A)  time series 
B)  time controlled 
C)  cross-sectional 
D)  periodic 
A)  time series 
B)  time controlled 
C)  cross-sectional 
D)  periodic

Question 20

In a questionnaire, respondents are asked to mark their marital status as single, married, divorced, or widowed. Marital status is an example of a(n) _____ variable.

Accepted Answer

A)  categorical 
B)  quantitative 
C)  interval-scale 
D)  ordinal-scale 
A)  categorical 
B)  quantitative 
C)  interval-scale 
D)  ordinal-scale

Exam 1: Data and Statistics

Goals scored in a soccer game is an example of

The number observations in a complete data set having 15 elements and 5 variables is

Data measured a nominal scale

The scale of measurement that is used to rank order the observation for a variable is called the _____ scale.

Categorical data

In a questionnaire, respondents are asked to mark their gender as male or female. The scale of measurement for gender is _____ scale.

Since a sample is a subset of the population, the sample mean _____ the mean of the population.

The numbers on football jerseys are an example of _____ data.

The set of measurements collected for a particular element are called

In a sample of 1,600 registered voters, 912 or 57% approve of the way the President is doing his job. The 57% approval is an example of

Arithmetic operations are inappropriate for

Dr. Kurt Thearling, a leading practitioner in the field, defines data mining as "the _____ extraction of _____ information from databases."

A statistics professor asked students in a class their ages. Based on this information, the professor states that the average age of all the students in the university is 24 years. This is an example of

In a post office, the mailboxes are numbered from 1 to 4,500. These numbers represent

The type of analytics whose models yield a best course of action to take is _____ analytics.

Which of the following is a categorical variable?

Statistical studies in which researchers control variables of interest are _____ studies.

In a random sample of 200 items, 5 items were defective. An estimate of the percentage of defective items in the population is

Data collected over several time periods are _____ data.

In a questionnaire, respondents are asked to mark their marital status as single, married, divorced, or widowed. Marital status is an example of a(n) _____ variable.

Descriptive Statistics: Tabular and Graphical Displays

Descriptive Statistics: Numerical Measures

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Comparing Multiple Proportions, Tests of Independence and Goodness of Fit

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Regression Analysis: Model Building

Time Series Analysis and Forecasting

Nonparametric Methods

Decision Analysis

Index Numbers

Statistical Methods for Quality Control

Sample Survey

Filters

Dr. Kurt Thearling, a leading practitioner in the field, defines data mining as "the _ extraction of _ information from databases."