Question 1

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. The 57% approval is an example of
A)a sample
B)descriptive statistics
C)statistical inference
D)a population

Accepted Answer

The 57% approval rate is an example of descriptive statistics, which summarizes and describes the characteristics of a given sample. It does not involve making inferences about a larger population, nor does it represent a population or a sample size.

Question 2

Exhibit 1-3
Part of the data bank of a corporation is shown below. 
-Refer to Exhibit 1-3. Employee Number is an example of ________ data.
A)nominal
B)ordinal
C)interval
D)ratio

Accepted Answer

Employee Number is an example of nominal data, as it represents unique identifiers for each employee and does not have any inherent order or numerical value.

Question 3

How many scales of measurement exist?
A)1
B)2
C)3
D)4

Accepted Answer

There are four scales of measurement: nominal, ordinal, interval, and ratio.

Question 4

A survey to collect data on the entire population is
A)a census
B)a sample
C)a population
D)an inference

Accepted Answer

A survey to collect data on the entire population is a census. A census aims to gather information from every member of the population, whereas a sample is a subset of the population used to make inferences about the entire population. Population refers to the entire group being studied, and inference involves drawing conclusions or making predictions based on the data collected.

Question 5

Which of the following can be classified as quantitative data?
A)interval and ordinal
B)ratio and ordinal
C)nominal and ordinal
D)interval and ratio

Accepted Answer

Quantitative data is numerical data, which can be measured or counted. Interval and ratio are both types of numerical data and can be classified as quantitative data. Nominal and ordinal data are categorical and do not involve numerical values.

Question 6

In observational studies, the variable of interest
A)is not controlled
B)is controlled
C)must be numerical
D)cannot be numerical

Accepted Answer

Observational studies are conducted by observing and measuring the variable of interest without any intervention or control. Therefore, the variable of interest is not controlled in an observational study.

Question 7

In Excel, a worksheet that displays the formulas used to create the results is a
A)results worksheet
B)formula worksheet
C)value worksheet
D)sample worksheet

Accepted Answer

A worksheet that displays the formulas used to create the results is called a formula worksheet.

Question 8

Exhibit 1-1
In a recent study based upon an inspection of 200 homes in Daisy City, 80 were found to violate one or more city codes.
-Refer to Exhibit 1-1. The manager's statement that 40% of Daisy City's 2,000 homes are in violation of city codes is
A)an exactly correct statement
B)only an approximation, since it is based upon sample information
C)obviously wrong, since it is based upon a study of only 200 homes
D)None of these alternatives is correct.

Accepted Answer

The manager's statement is based upon a sample of 200 homes, which is not necessarily representative of the entire population of 2,000 homes. Therefore, the statement is only an approximation and not exactly correct.

Question 9

On a street, the houses are numbered from 300 to 450. The house numbers are examples of
A)categorical data
B)quantitative data
C)both quantitative and categorical data
D)neither quantatative nor categorical data

Accepted Answer

The answer of On a street, the houses are numbered...

Question 10

In Excel, a worksheet that displays the data for the problem and shows the results of the analysis is
A)a formula worksheet
B)a value worksheet
C)an absolute worksheet
D)a descriptive worksheet

Accepted Answer

A worksheet that displays data and shows analysis results is typically referred to as a value worksheet. A formula worksheet contains formulas without displaying data, an absolute worksheet contains absolute values, and a descriptive worksheet may contain descriptive statistics but does not necessarily show analysis results.

Question 11

A population is
A)the same as a sample
B)the selection of a random sample
C)the collection of all items of interest in a particular study
D)always the same size as the sample

Accepted Answer

A population refers to the entire collection of items or individuals of interest in a particular study, not just a subset like a sample. Therefore, option C is the correct answer. Option A is incorrect because a population is not the same as a sample. Option B is incorrect because a population is not the selection of a random sample. Option D is incorrect because a population can be larger than a sample.

Question 12

Census refers to
A)an experimental study to collect data on the entire population
B)an experimental study to collect data on a sample
C)a survey to collect data on a sample
D)a survey to collect data on the entire population

Accepted Answer

A census is a survey that collects data on the entire population, not just a sample.

Question 13

Exhibit 1-1
In a recent study based upon an inspection of 200 homes in Daisy City, 80 were found to violate one or more city codes.
-Refer to Exhibit 1-1. The Daisy City study described above is an example of the use of a
A)census
B)sample
C)probability
D)population

Accepted Answer

The study is based on an inspection of 200 homes, which is a sample of the population of homes in Daisy City. It is not a census because it does not cover the entire population. Probability is not directly involved in the description of the study. Population refers to the entire group being studied, which is not the case here since only a sample of homes was inspected.

Question 14

The sample size
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

Accepted Answer

The answer of The sample size
A)can be larger than the...

Question 15

An interviewer has made an error in recording the data. This type of error is known as
A)an experimental error
B)a data acquisition error
C)a non-experimental error
D)a conglomerate error

Accepted Answer

A data acquisition error refers to mistakes made during the collection or recording of data, which is likely what the interviewer has done. An experimental error would be a mistake made during the actual experiment or study, which does not seem to be the case here. Non-experimental error and conglomerate error are not commonly used terms in the context of data collection and analysis.

Question 16

In a random sample of 200 items, 5 items were defective. An estimate of the percentage of defective items in the population is
A)5.0%
B)2.5%
C)200
D)10.0%

Accepted Answer

The percentage of defective items is calculated by dividing the number of defective items by the total number of items and then multiplying by 100. So, (5/200) * 100 = 2.5%.

Question 17

Exhibit 1-1
In a recent study based upon an inspection of 200 homes in Daisy City, 80 were found to violate one or more city codes.
-Refer to Exhibit 1-1. The city manager released a statement that 40% of Daisy City's 2,000 homes are in violation of city codes. The manager's statement is an example of
A)a census
B)an experiment
C)descriptive statistics
D)statistical inference

Accepted Answer

The city manager's statement is an example of statistical inference because it is based on a sample of 200 homes and the manager is using that sample to make an inference about the entire population of 2,000 homes.

Question 18

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

Accepted Answer

The statement "Fifty-seven percent of all voters approve of the President" is an example of statistical inference because it uses the sample data to make a generalization about the entire population of voters.

Question 19

Exhibit 1-3
Part of the data bank of a corporation is shown below. 
-Refer to Exhibit 1-3. Gender is an example of ________ data.
A)nominal
B)ordinal
C)interval
D)ratio

Accepted Answer

Gender is an example of nominal data, which is a categorical data type with no inherent order or ranking.

Question 20

In experimental studies, the variable of interest
A)is not controlled
B)is controlled
C)must be numerical
D)cannot be numerical

Accepted Answer

In experimental studies, the variable of interest must be controlled to ensure that any observed effects are actually due to the manipulation of that variable.

Quiz 1: Data and Statistics

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. The 57% approval is an example of

Exhibit 1-3 Part of the data bank of a corporation is shown below. -Refer to Exhibit 1-3. Employee Number is an example of ________ data.

How many scales of measurement exist?

A survey to collect data on the entire population is

Which of the following can be classified as quantitative data?

In observational studies, the variable of interest

In Excel, a worksheet that displays the formulas used to create the results is a

Exhibit 1-1 In a recent study based upon an inspection of 200 homes in Daisy City, 80 were found to violate one or more city codes. -Refer to Exhibit 1-1. The manager's statement that 40% of Daisy City's 2,000 homes are in violation of city codes is

On a street, the houses are numbered from 300 to 450. The house numbers are examples of

In Excel, a worksheet that displays the data for the problem and shows the results of the analysis is

A population is

Census refers to

Exhibit 1-1 In a recent study based upon an inspection of 200 homes in Daisy City, 80 were found to violate one or more city codes. -Refer to Exhibit 1-1. The Daisy City study described above is an example of the use of a

The sample size

An interviewer has made an error in recording the data. This type of error is known as

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

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

Exhibit 1-3 Part of the data bank of a corporation is shown below. -Refer to Exhibit 1-3. Gender is an example of ________ data.

In experimental studies, the variable of interest