Question 1

The sample size

Accepted Answer

A) can be larger than the population size 
B) is always smaller than the population size 
C) can be larger or smaller than the population size 
D) is always equal to the size of the population 
A) can be larger than the population size 
B) is always smaller than the population size 
C) can be larger or smaller than the population size 
D) is always equal to the size of the population B

Question 2

The subject of data mining deals with

Accepted Answer

A) methods for developing useful decision-making information from large data bases 
B) keeping data secure so that unauthorized individuals cannot access the data 
C) computational procedure for data analysis 
D) computing the average for data 
A) methods for developing useful decision-making information from large data bases 
B) keeping data secure so that unauthorized individuals cannot access the data 
C) computational procedure for data analysis 
D) computing the average for data A

Question 3

The following shows the temperatures (high,low)and weather conditions in a given Sunday for some selected world cities.For the weather conditions,the following notations are used: c = clear;cl = cloudy;sh = showers;pc = partly cloudy.
   
a.How many elements are in this data set?
b.How many variables are in this data set?
c.How many observations are in this data set?
d.Name the variables and indicate whether they are categorical or quantitative.
e.For which variables are arithmetic operations appropriate and for which are they not appropriate?

Accepted Answer

a.7
b.3
c.7
d.Hi: quantitative,Lo: quantitative,Condition: categorical
e.Hi: appropriate,Lo: appropriate,Condition: not appropriate

Question 4

The following information regarding the ten richest Americans was reported in a recent issue of Forbes.
   
a.How many elements are in the above data set?
b.How many variables are in this data set?
c.How many observations are in this data set?
d.Which variables are categorical and which are quantitative?
e.What measurement scale is used for each variable?

Accepted Answer

a.10
b.5
c.10
d.Worth and Age

Question 5

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

Accepted Answer

A) is always smaller than the mean of the population 
B) is always larger than the mean of the population 
C) must be equal to the mean of the population 
D) can be larger,smaller,or equal to the mean of the population 
A) is always smaller than the mean of the population 
B) is always larger than the mean of the population 
C) must be equal to the mean of the population 
D) can be larger,smaller,or equal to the mean of the population

Question 6

The collection of all elements of interest in a particular study is

Accepted Answer

A) the population 
B) the sampling 
C) statistical inference 
D) descriptive statistics 
A) the population 
B) the sampling 
C) statistical inference 
D) descriptive statistics

Question 7

Which scale of measurement can be either numeric or nonnumeric?

Accepted Answer

A) nominal 
B) ratio 
C) interval 
D) None of these alternatives is correct. 
A) nominal 
B) ratio 
C) interval 
D) None of these alternatives is correct.

Question 8

Arithmetic operations are inappropriate for

Accepted Answer

A) the ratio scale 
B) the interval scale 
C) both the ratio and interval scales 
D) the nominal scale 
A) the ratio scale 
B) the interval scale 
C) both the ratio and interval scales 
D) the nominal scale

Question 9

Another name for "observations" is

Accepted Answer

A) views 
B) variables 
C) cases 
D) None of these alternatives is correct. 
A) views 
B) variables 
C) cases 
D) None of these alternatives is correct.

Question 10

Which of the following variables use the ratio scale of measurement?

Accepted Answer

A) social security number 
B) temperature 
C) gender 
D) income 
A) social security number 
B) temperature 
C) gender 
D) income

Question 11

Exhibit 1-2
In a sample of 1,600 registered voters,912,or 57%,approve of the way the President is doing his job.
-Refer to Exhibit 1-2.A political pollster states: "Fifty-seven percent of all voters approve of the President." This statement 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 12

A portion of the population selected to represent the population is called

Accepted Answer

A) statistical inference 
B) descriptive statistics 
C) a census 
D) a sample 
A) statistical inference 
B) descriptive statistics 
C) a census 
D) a sample

Question 13

Data

Accepted Answer

A) are always be numeric 
B) are always nonnumeric 
C) are the raw material of statistics 
D) None of these alternatives is correct. 
A) are always be numeric 
B) are always nonnumeric 
C) are the raw material of statistics 
D) None of these alternatives is correct.

Question 14

Data collected at the same,or approximately the same,point in time are

Accepted Answer

A) time series data 
B) approximate time series data 
C) crossectional data 
D) approximate data 
A) time series data 
B) approximate time series data 
C) crossectional data 
D) approximate data

Question 15

Arithmetic operations are appropriate for

Accepted Answer

A) only the ratio scale 
B) only the interval scale 
C) the nominal scale 
D) None of these alternatives is correct. 
A) only the ratio scale 
B) only the interval scale 
C) the nominal scale 
D) None of these alternatives is correct.

Question 16

Social security numbers consist of numeric values.Therefore,social security is an example of

Accepted Answer

A) a quantitative variable 
B) either a quantitative or a categorical variable 
C) an exchange variable 
D) a categorical variable 
A) a quantitative variable 
B) either a quantitative or a categorical variable 
C) an exchange variable 
D) a categorical variable

Question 17

A recent issue of a national magazine reported that in a national public opinion survey conducted among 2,000 individuals,56% were in favor of gun control,40% opposed gun control,and 4% had no opinion on the subject.
a.What is the sample in this survey?
b.Based on the sample,what percentage of the population would you think is in favor of gun control?
c.Based on the sample,what percentage of the population would you think have no opinion on the subject?

Accepted Answer

a.The 2000 individua

Question 18

Exhibit 1-4
In many universities,students evaluate their professors by means of answering a questionnaire.Assume a questionnaire is distributed to a class of 45 students.Students are asked to answer the following:1.Sex2.Race (Black,White,Other)3.Age4.Number of hours completed5.Grade point average6.My instructor is a very effective teacher
  
-Refer to Exhibit 1-4.How many elements are in the above data set?

Accepted Answer

A) 5 
B) 6 
C) 3 
D) 45 
A) 5 
B) 6 
C) 3 
D) 45

Question 19

Methods for developing useful decision-making information from large data bases is known as

Accepted Answer

A) data manipulation 
B) data monitoring 
C) data base conversion 
D) data mining 
A) data manipulation 
B) data monitoring 
C) data base conversion 
D) data mining

Question 20

In a questionnaire,respondents are asked to mark their gender as male or female.Gender is an example of the

Accepted Answer

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

The sample size

The subject of data mining deals with

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

The collection of all elements of interest in a particular study is

Which scale of measurement can be either numeric or nonnumeric?

Arithmetic operations are inappropriate for

Another name for "observations" is

Which of the following variables use the ratio scale of measurement?

Exhibit 1-2 In a sample of 1,600 registered voters,912,or 57%,approve of the way the President is doing his job. -Refer to Exhibit 1-2.A political pollster states: "Fifty-seven percent of all voters approve of the President." This statement is an example of

A portion of the population selected to represent the population is called

Data

Data collected at the same,or approximately the same,point in time are

Arithmetic operations are appropriate for

Social security numbers consist of numeric values.Therefore,social security is an example of

Methods for developing useful decision-making information from large data bases is known as

In a questionnaire,respondents are asked to mark their gender as male or female.Gender is an example of the

Descriptive Statistics: Tabular and Graphical Presentations

Descriptive Statistics: Numerical Measures

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Statistical Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Tests of Goodness of Fit and Independence

Analysis of Variance and Experimental Design

Simple Linear Regression

Multiple Regression

Regression Analysis: Model Building

Index Numbers

Forecasting

Nonparametric Methods

Statistical Methods for Quality Control

Decision Analysis

Sample Survey

Filters

Exam 1: Data and Statistics

The sample size

The subject of data mining deals with

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

The collection of all elements of interest in a particular study is

Which scale of measurement can be either numeric or nonnumeric?

Arithmetic operations are inappropriate for

Another name for "observations" is

Which of the following variables use the ratio scale of measurement?

Exhibit 1-2 In a sample of 1,600 registered voters,912,or 57%,approve of the way the President is doing his job. -Refer to Exhibit 1-2.A political pollster states: "Fifty-seven percent of all voters approve of the President." This statement is an example of

A portion of the population selected to represent the population is called

Data

Data collected at the same,or approximately the same,point in time are

Arithmetic operations are appropriate for

Social security numbers consist of numeric values.Therefore,social security is an example of

Methods for developing useful decision-making information from large data bases is known as

In a questionnaire,respondents are asked to mark their gender as male or female.Gender is an example of the

Descriptive Statistics: Tabular and Graphical Presentations

Descriptive Statistics: Numerical Measures

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Statistical Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Tests of Goodness of Fit and Independence

Analysis of Variance and Experimental Design

Simple Linear Regression

Multiple Regression

Regression Analysis: Model Building

Index Numbers

Forecasting

Nonparametric Methods

Statistical Methods for Quality Control

Decision Analysis

Sample Survey

Filters