Question 1

Descriptive statistics focuses on summarizing and presenting data, and includes tables and graphs as well as numerical statistics.

Accepted Answer

Descriptive statistics indeed focuses on summarizing and presenting data in a meaningful way, which includes the use of tables, graphs, and various numerical measures such as mean, median, mode, and standard deviation.

Question 2

Ratio data has all the properties of interval data, plus a natural zero point, allowing for legitimate ratio comparisons.

Accepted Answer

Ratio data includes all the characteristics of interval data (order, equal intervals) and adds a meaningful zero point, which allows for the calculation of ratios, making statements like "twice as much" valid.

Question 3

What is the primary goal of statistics?
A)to create an environment of certainty in decision making
B)to transform data into information
C)to make everything measurable
D)to raise the level of data from ordinal to interval
E)to calculate various measures

Accepted Answer

The primary goal of statistics is to transform data into information, enabling the interpretation and analysis of data to support decision-making and research.

Question 4

Time series data are data collected at, or representing, the same point in time.

Accepted Answer

Time series data are data collected or recorded at different points in time, often at regular intervals, to analyze trends, patterns, or changes over time.

Question 5

With a deterministic view of the world, there is randomness in the world.

Accepted Answer

A deterministic view of the world posits that every event or action is causally determined by an unbroken chain of prior occurrences, leaving no room for randomness.

Question 6

A statistics professor asked students in a class their height.On the basis of this information, the professor states that the average height of all the students in the university is 67.3 inches.This is an example of:
A)a census
B)descriptive statistics
C)an experiment
D)statistical inference
E)none of the above

Accepted Answer

The professor is using the sample data (heights of students in one class) to make a generalization about the entire population (all students in the university), which is an example of statistical inference.

Question 7

Cross-sectional data are data collected at, or representing, the same point in time.

Accepted Answer

Cross-sectional data refer to observations collected from multiple subjects (such as individuals, firms, countries, or regions) at the same or approximately the same point in time. This type of data contrasts with time series data, which are collected from the same subjects across different points in time.

Question 8

The Internet is NOT a good source of data because the data cannot be verified.

Accepted Answer

The Internet contains both verifiable and unverifiable data, and many reputable sources are available online for data verification.

Question 9

What is the order of the four activities related to data involved in statistics?
A)collecting, analyzing, interpreting, and presenting
B)collecting, interpreting, analyzing, and presenting
C)analyzing, collecting, presenting, and interpreting
D)analyzing, presenting, interpreting, and collecting
E)interpreting, collecting, analyzing, and presenting

Accepted Answer

The correct order for activities related to data in statistics is collecting the data first, analyzing the collected data to find patterns or insights, interpreting the results of the analysis to understand what they mean in the context of the research question or problem, and finally presenting the findings in a comprehensible manner.

Question 10

Qualitative data are never numeric.

Accepted Answer

Qualitative data can include non-numeric information such as descriptions, qualities, and categories, but it can also include numeric data that categorizes or identifies without indicating quantity or order, such as identification numbers.

Question 11

Statistics is the art and science of collecting, analyzing, interpreting, and presenting data in an effort to transform that data into useful information.

Accepted Answer

Statistics involves processes and methods for collecting, analyzing, interpreting, and presenting data, aiming to convert raw data into insightful information for decision-making and understanding phenomena.

Question 12

Which of the following is that branch of statistics that deals with the selection and use of sample data to produce information about the larger population from which the sample was selected:
A)inferential statistics
B)descriptive statistics
C)statistical inference
D)report generation
E)none of the above

Accepted Answer

Inferential statistics is the branch of statistics that involves using sample data to make inferences or predictions about a larger population.

Question 13

The ASA's Ethical Guidelines for Statistical Practice call for integrity, openness, and diligence in all aspects of statistical work.

Accepted Answer

The American Statistical Association (ASA) has established Ethical Guidelines for Statistical Practice to promote integrity, openness, and diligence among statisticians, ensuring responsible and ethical behavior in their professional activities.

Question 14

Data measured on an interval scale cannot be rank-ordered.

Accepted Answer

Data measured on an interval scale can indeed be rank-ordered, as the scale not only specifies the order of items but also the exact differences between them.

Question 15

Numeric data are always quantitative.

Accepted Answer

Numeric data can be quantitative (measuring or counting a numerical amount) or qualitative (categorical data coded as numbers, such as 1 for male and 2 for female).

Question 16

Statistics is the art and science of collecting, analyzing, and interpreting data.

Accepted Answer

The answer of Statistics is the art and science of...

Question 17

Descriptive statistics focuses on summarizing data while inferential statistics deals with the selection and use of sample data to produce information about the larger population from which the sample was selected.

Accepted Answer

Descriptive statistics summarize and describe the features of a dataset, such as mean or standard deviation, while inferential statistics use sample data to make generalizations or predictions about a larger population.

Question 18

The primary goal of statistics is to select data to support a particular position.

Accepted Answer

The primary goal of statistics is to analyze and interpret data to understand patterns, trends, and relationships, not to select data to support a preconceived position.

Question 19

Which of the following is that branch of statistics that focuses on summarizing and presenting data:
A)inferential statistics
B)descriptive statistics
C)statistical inference
D)report generation
E)none of the above

Accepted Answer

Descriptive statistics is the branch of statistics that focuses on summarizing and presenting data, using tools such as graphs, charts, and summary measures to describe and visualize data sets.

Question 20

Quantitative data are always numeric.

Accepted Answer

Quantitative data refer to data that can be quantified, meaning it is expressed or expressible as numbers, which includes counts, measurements, and statistical operations.

Quiz 1: An Introduction to Statistics