Question 1

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

Statistically unsophisticated users who lack understanding of statistical procedures and their limitations may easily misinterpret computer-generated results, leading to problems in decision-making or drawing conclusions. This statement is true. Understanding statistical assumptions and limitations is important in correctly interpreting and using results obtained from computer software. Unsophisticated users may not have this understanding and may be misled by results that are not applicable or that have been obtained using inappropriate assumptions.

Question 2

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

Accepted Answer

Inference about the population based on the sample is actually a key element of descriptive statistical problems. The other three answer choices are all elements of descriptive statistics - identifying the population or sample, using visual aids or numerical summaries to describe the data, and identifying patterns in the data.

Question 3

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 4

The Human Resources Director of a large corporation wishes to develop an employee benefit 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 5

Which of the following is not true about business analytics?

Accepted Answer

Business analytics is not meant to replace the need for organizational decision making and problem solving, but rather to enhance it by providing data-driven insights and supporting evidence-based decision making. Business analytics does not replace the need for organizational decision making and problem solving, but rather enhances it. Therefore, option C is not true about business analytics.

Question 6

The collection and summarization of the socioeconomic and physical characteristics of the employees of a particular firm are examples of

Accepted Answer

Descriptive statistics involve the collection and summarization of data, such as the socioeconomic and physical characteristics of employees in a firm. Inferential statistics make inferences or predictions based on the data. Operational definition is a clear, concise explanation of a concept or variable. DCOVA framework is not a statistical concept. Descriptive statistics are used to summarize and describe the characteristics of a group or population, which can include socioeconomic and physical characteristics of employees in a firm. Inferential statistics, on the other hand, are used to draw conclusions or make predictions about a larger population based on a sample. Operational definition refers to defining a concept or variable in a specific and measurable way, and DCOVA framework is not a statistical concept.

Question 7

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 to have a good understanding of statistics to perform various tasks effectively. Managers often deal with large amounts of data and need to be able to analyze and interpret it in order to make informed decisions. Understanding statistics is an important component of this process.

Question 8

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.

Accepted Answer

The variable of interest to the researcher is the textbook cost of first-year Drummand University students, which is explicitly stated in the question. The other answer choices are not relevant to the researcher's inquiry.

Question 9

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 do indeed involve the combination of statistical methods with techniques from management science and information systems, to help support evidence-based decision making in the business world. Business analytics indeed 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.

Question 10

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

Accepted Answer

This is an example of inferential statistics because it involves using sample data to make inferences about a population parameter (average family expenditure on food).

Question 11

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 12

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.

Accepted Answer

The variable of interest in the study is the height of the American pine trees, as the study aims to determine what factors aid a tree in reaching heights greater than 60 feet tall.

Question 13

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

Accepted Answer

Descriptive statistics involves collecting, organizing, summarizing and presenting data to describe the features of a set of data without making any inferences or predictions about a larger population. The other options, statistical inference involves making predictions based on sample data about a larger population, DCOVA framework is a design thinking tool, and operational definition is the definition of a concept in terms of measurable operations or procedures.

Question 14

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 of 20 students to make an inference about the larger population of 1,500 students, which is the basis of inferential statistics. Inferential statistics involves using data from a sample to make inferences or predictions about a larger population. In this case, the professor used the sample average exam score to estimate the average exam score of the larger population of 1,500 students.

Question 15

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

This is an example of inferential statistics, where the information from one population (Iowa) is used to make predictions about another population (Vermont). Descriptive statistics, on the other hand, is focused on summarizing and describing data within a single population. Using data from one state to predict the behavior of another state is not an example of descriptive statistics, but rather an example of inferential statistics. Descriptive statistics involves summarizing and describing data within a particular population, while inferential statistics involves using data from a sample to make predictions or draw conclusions about a larger population.

Question 16

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

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

Question 17

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

Accepted Answer

Statistical inference is the process of using data collected from a small group (sample) to make generalizations or reach conclusions about a larger group (population). This is done by analyzing the sample data and applying statistical methods to estimate or infer characteristics of the population. DCOVA framework is a problem-solving technique, operational definition is a clear and concise explanation of a variable or concept, and descriptive statistics is a branch of statistics that involves summarizing and describing a set of data without making inferences or predictions.

Question 18

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 19

The Human Resources Director of a large corporation wishes to develop an employee benefit 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 20

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)is called _______ .

Accepted Answer

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

Quiz 21: Understanding Statistics: Descriptive and Inferential Techniques

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.

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

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

Which of the following is not true about business analytics?

The collection and summarization of the socioeconomic and physical characteristics of the employees of a particular firm are examples of

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.

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

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 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.

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.

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