BNAD 276 Exam 1

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

Designating males as 0 and females as to 1 to compare gender performance on the aptitude test.

In descriptive statistics, a polygon is best described as a:

Graph that connects the midpoints of each class and its associated frequency or relative frequency.

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?

Inferential Statistics

In general, we use sample data because:

Obtaining data from the population is often an expensive process.

Qualitative data that can be categorized and ranked are measured on the:

Ordinal Scale

A ______ includes all items of interest in a statistical problem

Population

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

Qualitative

A variable that is described verbally rather than numerically is called a(n):

Qualitative Variable

Sampling, rather than surveying an entire population, can offer some substantial benefits. Some of those benefits include:

Saving money and time.

Which of the following is an example of inferential statistics?

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

Which of the following statements is LEAST accurate?

The ratio scale is used for a quantitative variable.

Data that are collected by recording a characteristic of a subject over several time periods are referred to as ___?

Time Series Data

Statistics is used to?

To make informed decisions based on data.

The interval scale:

is less sophisticated than the ratio scale.

The ratio scale is:

more sophisticated than the nominal scale.

Which of the following graphical depictions are useful to observe the shape (distribution) of a data set for single variable?

-Histogram -Stem and leaf Diagram -Polygon

All of the following are examples of cross-sectional data:

-Last year's starting salary for 100 recent business graduates at Penn State University. -The hours worked last week by 50 employees at a factory. -Last month's unemployment rate for various cities in Ohio.

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

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

How does an ogive differ from a polygon?

An ogive is a graph of a cumulative (relative) frequency distribution, while a polygon is a graph of a (relative) frequency distribution.

One method of graphical presentation for qualitative data is a ____?

Bar Chart

With nominal data, you can

Categorize the data.

Consider the following variable: a runner's time in a 100-meter race. This variable is best categorized as a ______ variable.

Continuous

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

The branch of statistics that summarizes important aspects of a data set is often referred to as?

Descriptive Statistics

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

Results of market research testing current consumer preference for soda drinks.

A ______ is a (measured) subject of a population.

Sample