Practical Research: Planning and Design Twelfth Edition Chapter 11 Quiz

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20 Questions

Which type of statistics describes what the data look like, how broadly they are spread, and how closely two or more variables within the data are associated with one another?

Descriptive statistics

What characteristic distinguishes a normal distribution?

It is vertically symmetrical

What is the defining feature of nominal data?

They have separate, non-ranked categories

Which type of variables involve an infinite number of possible values?

Continuous variables

What does inferential statistics allow us to do?

Draw inferences about large populations by collecting data on relatively small samples

What is the purpose of organizing data before analysis?

To make the data easier to understand and interpret

What is one of the uses of electronic spreadsheets for organizing and analyzing data?

Graphing from the data

Why should every researcher be able to provide a clear, logical rationale for the procedure used to organize data?

To demonstrate transparency and reproducibility

In what ways can data be organized for analysis?

In a table and in a graph

What are statistics used for in relation to numerical data?

To find patterns and meaning in the data

What is the purpose of organizing data before analysis?

To identify patterns and meaningful relationships in the data

What characteristic distinguishes a normal distribution?

It has a bell-shaped curve

What is the defining feature of nominal data?

It represents categories with no inherent order

What does inferential statistics allow us to do?

Make predictions or inferences about a population based on a sample

Which type of variables involve an infinite number of possible values?

Continuous variables

Which type of data involves equal intervals and a true zero point?

Ratio

What type of distribution is horizontally symmetrical with its highest point at the midpoint?

Normal

Which type of statistics allows us to draw inferences about large populations by collecting data on relatively small samples?

Inferential statistics

What distinguishes ratio data from interval data?

Ratio data has equal intervals and a true zero point

What distinguishes a skewed distribution from a normal distribution?

Normal distribution is not symmetrical

Study Notes

Types of Statistics

  • Descriptive statistics describe what the data look like, how broadly they are spread, and how closely two or more variables are associated with one another.

Normal Distribution

  • A normal distribution is characterized by symmetry around the mean, with the highest point at the midpoint.

Data Types

  • Nominal data are defined by having no inherent order or hierarchy.
  • Interval data have equal intervals, but no true zero point.
  • Ratio data have equal intervals and a true zero point.
  • Continuous variables involve an infinite number of possible values.

Inferential Statistics

  • Inferential statistics allow us to draw inferences about large populations by collecting data on relatively small samples.

Data Organization

  • Organizing data before analysis helps to identify patterns, relationships, and errors.
  • Data can be organized by sorting, grouping, or categorizing.
  • Electronic spreadsheets are a useful tool for organizing and analyzing data.
  • Every researcher should be able to provide a clear, logical rationale for the procedure used to organize data.

Skewed Distribution

  • A skewed distribution is asymmetrical, distinguishing it from a normal distribution.

Test your understanding of analyzing quantitative data, organizing data sets, and computational procedures in statistics with this quiz based on Practical Research: Planning and Design Twelfth Edition Chapter 11.

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