Question 1

Which of the following is not an element of descriptive statistical problems?
A)An inference made about the population based on the sample
B)The population or sample of interest
C)Tables,graphs,or numerical summary tools
D)Identification of patterns in the data

Accepted Answer

Inference is part of inferential statistics, not descriptive statistics. Descriptive statistics focuses on summarizing and presenting data, while inferential statistics involves making inferences about the population based on sample data.

Question 2

True or False: Compiling the number of registered voters who turned out to vote for the primary in Iowa is an example of descriptive statistics.

Accepted Answer

Descriptive statistics summarize and organize characteristics of a data set, such as compiling the number of registered voters who turned out to vote, which is an example of describing a dataset without inferring beyond it.

Question 3

The Commissioner of Health in New York State wanted to study malpractice litigation in New York.A sample of 31 thousand medical records was drawn from a population of 2.7 million patients who were discharged during 2010.Using the information obtained from the sample to predict population characteristics with respect to malpractice litigation is an example of ________.

Accepted Answer

inferential statistics

Question 4

The oranges grown in corporate farms in an agricultural state were damaged by some unknown fungi a few years ago.Suppose the manager of a large farm wanted to study the impact of the fungi on the orange crops on a daily basis over a 6-week period.On each day a random sample of orange trees was selected from within a random sample of acres.The daily average number of damaged oranges per tree and the proportion of trees having damaged oranges were calculated.In this study,the presentation and characterization of the two main measures calculated each day (i.e.,average number of damaged oranges per tree and proportion of trees having damaged oranges)are called ________.

Accepted Answer

The answer of The oranges grown in corporate farms in...

Question 5

True or False: A professor computed the sample average exam score of 20 students and used it to estimate the average exam score of the 1,500 students taking the exam.This is an example of inferential statistics.

Accepted Answer

The professor used the sample average to make an inference about the population average. This is an example of inferential statistics.

Question 6

True or False: Problems may arise when statistically unsophisticated users who do not understand the assumptions behind the statistical procedures or their limitations are misled by results obtained from computer software.

Accepted Answer

This is true. Users who do not have knowledge about the statistical assumptions and limitations may get misled by results obtained from software. They may draw wrong conclusions or make inappropriate decisions based on the output obtained from the software. Hence, it is important for users to have statistical knowledge to correctly interpret the results obtained from software.

Question 7

True or False: Managers need an understanding of statistics to be able to present and describe information accurately,draw conclusions about large populations based on small samples,improve processes,and make reliable forecasts.

Accepted Answer

Managers need an understanding of statistics in order to accurately present and describe information, make predictions, improve processes, and make reliable forecasts.

Question 8

The oranges grown in corporate farms in an agricultural state were damaged by some unknown fungi a few years ago.Suppose the manager of a large farm wanted to study the impact of the fungi on the orange crops on a daily basis over a 6-week period.On each day a random sample of orange trees was selected from within a random sample of acres.The daily average number of damaged oranges per tree and the proportion of trees having damaged oranges were calculated.In this study,drawing conclusions on any one day about the true population characteristics based on information obtained from the sample is called ________.

Accepted Answer

The answer of The oranges grown in corporate farms in...

Question 9

The process of using data collected from a small group to reach conclusions about a large group is called
A)statistical inference.
B)DCOVA framework.
C)operational definition.
D)descriptive statistics.

Accepted Answer

Statistical inference involves using data from a small sample to make conclusions or predictions about a larger population. The other options are not directly related to this process.

Question 10

True or False: Business analytics combine "traditional" statistical methods with methods and techniques from management science and information systems to form an interdisciplinary tool that supports fact-based management decision making.

Accepted Answer

Business analytics is an interdisciplinary tool that combines traditional statistical methods with methods and techniques from management science and information systems to support fact-based management decision making.

Question 11

The collection and summarization of the socioeconomic and physical characteristics of the employees of a particular firm is an example of
A)inferential statistics.
B)descriptive statistics.
C)operational definition.
D)DCOVA framework.

Accepted Answer

Descriptive statistics involve collecting and summarizing data, which is what is being done in this example. Inferential statistics involve making predictions or drawing conclusions about a population based on a sample. Operational definition refers to the process of defining a variable in precise and measurable terms, and DCOVA framework is not a relevant concept in this context.

Question 12

Most analysts focus on the cost of tuition as the way to measure the cost of a college education.But incidentals,such as textbook costs,are rarely considered.A researcher at Drummand University wishes to estimate the textbook costs of first-year students at Drummand.To do so,she monitored the textbook cost of 250 first-year students and found that their average textbook cost was $600 per semester.Identify the variable of interest to the researcher.
A)The textbook cost of first-year Drummand University students
B)The year in school of Drummand University students
C)The age of Drummand University students
D)The cost of incidental expenses of Drummand University students

Accepted Answer

The variable of interest to the researcher is the textbook cost of first-year Drummand University students, which is the only variable mentioned in the question. The other answer choices are not relevant to the researcher's goal of estimating textbook costs.

Question 13

The Human Resources Director of a large corporation wishes to develop an employee benefits package and decides to select 500 employees from a list of all (N = 40,000)workers in order to study their preferences for the various components of a potential package.In this study,methods that result in decisions concerning population characteristics based only on the sample results are called ________.

Accepted Answer

The answer of The Human Resources Director of a large...

Question 14

Which of the following is not true about business analytics?
A)It enables you to use statistical methods to analyze and explore data to uncover unforeseen relationships.
B)It enables you to use management science methods to develop optimization models that impact an organization's strategy,planning,and operations.
C)It enables you to use complex mathematics to replace the need for organizational decision making and problem solving.
D)It enables you to use information systems methods to collect and process data sets of all sizes.

Accepted Answer

Business analytics does not replace the need for organizational decision making and problem solving, rather it enhances and supports it with data-driven insights. Therefore, option C, which states that it enables you to use complex mathematics to replace the need for organizational decision making and problem solving, is not true about business analytics.

Question 15

The estimation of the population average family expenditure on food based on the sample average expenditure of 1,000 families is an example of
A)inferential statistics.
B)descriptive statistics.
C)DCOVA framework.
D)operational definition.

Accepted Answer

This is an example of inferential statistics as we are using the sample average expenditure to make an inference about the population average expenditure.

Question 16

True or False: Using the number of registered voters who turned out to vote for the primary in Iowa to predict the number of registered voters who will turn out to vote in Vermont's primary is an example of descriptive statistics.

Accepted Answer

Using the number of registered voters who turned out to vote in one state to predict turnout in another state is an example of inferential statistics, not descriptive statistics. Descriptive statistics describes the characteristics of a single dataset, while inferential statistics makes predictions or inferences about a population based on a sample from that population.

Question 17

Those methods involving the collection,presentation,and characterization of a set of data in order to properly describe the various features of that set of data are called
A)statistical inference.
B)DCOVA framework.
C)operational definition.
D)descriptive statistics.

Accepted Answer

Descriptive statistics involves collecting, presenting, and characterizing a set of data to provide a summary of its main features, such as measures of central tendency (mean, median, mode) and measures of variability (range, standard deviation). Statistical inference, on the other hand, involves drawing conclusions or making predictions about a population based on sample data. The DCOVA framework is a problem-solving approach used in engineering and design, and operational definition involves defining a concept or variable in terms of the specific procedures or measurements used to obtain or observe it.

Question 18

The Commissioner of Health in New York State wanted to study malpractice litigation in New York.A sample of 31 thousand medical records was drawn from a population of 2.7 million patients who were discharged during 2010.The collection,presentation,and characterization of the data from patient medical records are examples of ________.

Accepted Answer

The answer of The Commissioner of Health in New York...

Question 19

The Human Resources Director of a large corporation wishes to develop an employee benefits package and decides to select 500 employees from a list of all (N = 40,000)workers in order to study their preferences for the various components of a potential package.In this study,methods involving the collection,presentation,and characterization of the data are called ________.

Accepted Answer

The answer of The Human Resources Director of a large...

Question 20

A study is under way in Yosemite National Forest to determine the adult height of American pine trees.Specifically,the study is attempting to determine what factors aid a tree in reaching heights greater than 60 feet tall.It is estimated that the forest contains 25,000 adult American pines.The study involves collecting heights from 250 randomly selected adult American pine trees and analyzing the results.Identify the variable of interest in the study.
A)The age of an American pine tree in Yosemite National Forest
B)The height of an American pine tree in Yosemite National Forest
C)The number of American pine trees in Yosemite National Forest
D)The species of trees in Yosemite National Forest

Accepted Answer

The variable of interest in the study is the height of American pine trees in Yosemite National Forest, as the study is attempting to determine what factors aid a tree in reaching heights greater than 60 feet tall. The other options (age, number of trees, and species) may be factors that could potentially influence tree height, but they are not the primary focus of this particular study.

Quiz 32: Lets Get Started Big Things to Learn First

Which of the following is not an element of descriptive statistical problems?

True or False: Compiling the number of registered voters who turned out to vote for the primary in Iowa is an example of descriptive statistics.

True or False: A professor computed the sample average exam score of 20 students and used it to estimate the average exam score of the 1,500 students taking the exam.This is an example of inferential statistics.

True or False: Problems may arise when statistically unsophisticated users who do not understand the assumptions behind the statistical procedures or their limitations are misled by results obtained from computer software.

True or False: Managers need an understanding of statistics to be able to present and describe information accurately,draw conclusions about large populations based on small samples,improve processes,and make reliable forecasts.

The process of using data collected from a small group to reach conclusions about a large group is called

True or False: Business analytics combine "traditional" statistical methods with methods and techniques from management science and information systems to form an interdisciplinary tool that supports fact-based management decision making.

The collection and summarization of the socioeconomic and physical characteristics of the employees of a particular firm is an example of

Which of the following is not true about business analytics?

The estimation of the population average family expenditure on food based on the sample average expenditure of 1,000 families is an example of

True or False: Using the number of registered voters who turned out to vote for the primary in Iowa to predict the number of registered voters who will turn out to vote in Vermont's primary is an example of descriptive statistics.

Those methods involving the collection,presentation,and characterization of a set of data in order to properly describe the various features of that set of data are called