Chapter 11

Question 1

Which of the following is not a descriptive statistic?

Answer 1

correlational analysis

Question 2

Which of the following describes the purpose of the Chi-square test of independence?

Answer 2

Determines whether two variables are independent or related
Is a very weak statistical test
Has a high risk of a type II error

Question 3

The most common purpose of a Pearson’s correlation is to examine which of the following?

Answer 3

Relationships among variables

Question 4

A researcher wanted to study the elements or variables associated with fear. Which of the following would be an appropriate statistical measure?

Answer 4

Factor analysis

Question 5

Which of the following describes the tails of the normal curve?

Answer 5

They are representative samples that may not belong to the same population.
They are the extreme statistical values on the peripheral ends of the normal curve.
They are defined by the level of significance selected by the researcher.

Question 6

A researcher wants to conduct a study examining the relationship between gender and heart disease. Which of the following methods would be most appropriate?

Answer 6

Chi-square

Question 7

In any study in which the data are numerical, data analysis begins with which of the following?

Answer 7

Descriptive statistics

Question 8

During data cleaning, the researcher will perform which of the following? Select all that apply

Answer 8

Organize according to responses
Sort according to demographics
Correct all errors
Check the data for accuracy
Identify missing data points and supply the data

Question 9

Which of the following leads to a type I error?

Answer 9

When results indicate a significant difference when there is no difference

Question 10

The researcher understands that exploratory analysis is used for all except which of the following?

Answer 10

Generalize to a larger population

Question 11

The risk of a type II error increases with which of the following? Select all that apply.

Answer 11

Small effect sizes
Small samples
Low levels of power

Question 12

Which of the following is true of a one-tailed test of significance?

Answer 12

Indicates that extreme scores on only one tail are considered significant

Question 13

When interpreting research outcomes, the type of results that agree with those predicted by the researcher and support the logical links developed by the researcher among the framework, purpose, study questions, hypotheses, variables, and measurement tools is known as?

Answer 13

Significant results

Question 14

What do measures of dispersion indicate?

Answer 14

Individual differences of the members of the sample

Question 15

A researcher wants to compare the results of two tests completed on the same group. Which of the following methods would be most appropriate?

Answer 15

Z-score

Question 16

For what purpose is the t-test used?

Answer 16

To test for a significant difference between the means of two samples

Question 17

Which of the following best explains power?

Answer 17

It is the probability that a statistical test will detect a significant difference that exists.

Question 18

Which of the following is the purpose of exploratory data analysis? Select all that apply.

Answer 18

Obtain a better understanding of the data
Identify outliers
Determine the nature of variation in the data

Question 19

Using decision theory, if the level of significance was set at 0.05, which of the following probability levels from statistical analyses would indicate the greatest significant difference?

Answer 19

None of the above

Question 20

Which of the following does the normal curve indicate?

Answer 20

Theoretical frequency distribution of all possible values in a population

Question 21

For what reason is it important to describe the sample?

Answer 21

Determine if the sample is representative of the target population
Allow readers to determine if the sample is similar to persons in their clinical setting
Determine if groups being compared are equivalent

Question 22

To judge statistical suitability while critiquing a study, the nurse researcher needs to know all except which of the following?

Answer 22

Reliability of the measures

Question 23

To judge statistical suitability while critiquing a study, the nurse researcher needs to know all except which of the following?

Answer 23

Reliability of the measures

Question 24

Types of results from inferential statistical analyses include all except which of the following?

Answer 24

Findings

Question 25

Which of the following is not a characteristic of ANOVA?

Answer 25

Can be used only with two groups