SmartBook Ch. 1

Descriptive statistics involves which of the following?

Organizing data into charts and tables. Calculating numerical measures to summarize a set of data.

Which of the following are NOT time-series data?

The number of accounting, economics, finance, marketing, and management majors enrolled in school today.

Which of the following is an example of variable?

The number of pizzas ordered from Pizza Hut per day

Which of the following is an example of cross-sectional data?

The number of students in each business major at the start of this semester.

Which of the following scenarios is an example of the interval scale?

The outside temperature (in degrees Fahrenheit)

Which of the following statements is false?

The ratio scale is used for a qualitative variable

Which of the following is an example of descriptive statistics?

Use a table to display the grade point averages of the students in the statistics class.

The ratio scale is

more sophisticated than the nominal scale.

A professor's gender (male, female) represents ______ data and a professor's rank (assistant, associate, full) represents ______ data.

nominal, ordinal

A variable that assumes meaningful numerical values is called a(n) ______ variable.

quantitative

A research analyst collects data on the weekly closing price of gold throughout the year. The scale for these data is ______.

ratio

The interval scale is less sophisticated than the ______ scale.

ratio

Sampling is necessary when it is either impractical or impossible to survey the entire population. In which situation does surveying the entire population INSTEAD OF sampling just a part of the population make the most sense?

A teacher who has 30 students in her class wants to determine the average of the most recent test scores.

Northern University wants to determine the average starting salary for last year's graduates of its College of Business. What is the population from which a survey should be taken?

All of last year's graduates from Northern's College of Business who started working

Which of the following are true regarding big data?

Big data does not imply population data. Big data can be computationally burdensome.

From the scenarios below, indicate the one that BEST reflects the nominal scale.

Designate males as 0 and females as 1 to compare gender performance on an aptitude test.

Which measurement scales are associated with quantitative data?

Interval and ratio

All of the following are examples of cross-sectional data EXCEPT: Multiple choice question.

Quarterly sales for a computer company for the last five years.

Which of the following is an example of inferential statistics?

Test the longevity of all light bulbs based on a sample of 100 light bulbs.

When should sampling, rather than surveying an entire population, be used?

When examining the entire population is expensive. When examining the entire population takes too much time. When examining the population items destroys the items.

A significant weakness of the ordinal scale is

an inability to measure differences between the ranked values

The catchphrase to describe the massive amounts of structured and unstructured data that is being generated by businesses and organizations is called _____.

big data

With nominal data, you can

categorize the data

Data that are collected about many subjects at the same point in time or without regard to differences in time are known as ______ data.

cross-sectional

Consider the following variable: the number of people in a household. This variable is best categorized as a ______ variable.

discrete

Structured data would most likely be found

in an Excel spreadsheet. in an Access database.

The branch of statistics that draws conclusions about a large set of data based on a smaller set of data is often referred to as ______ statistics.

inferential

Structured data is characterized by which of the following.

its well-defined length and format. its ability to conform to the row-column format of a database.

Statistics is used

make informed decisions based on data

In general, we use sample data because

obtaining data from the population is often an expensive process.

Unstructured data would most likely be found in

on social media.

A ______ includes all items of interest in a statistical problem. Multiple choice question.

population

Questionable conclusions are the result of all of the following EXCEPT:

proper statistical analysis

Consider the following variable: the color of a car in a parking lot. This variable is best categorized as a ______ variable.

qualitative

Data that are collected by recording a characteristic of a subject over several time periods are referred to as ______ data.

time series

A characteristic of interest that differs among various observations is referred to as a ______.

variable