Question 1

It is possible to violate the assumption of normal distribution and still have a robust result.

Accepted Answer

A) True 
 B)False  True

Question 2

For Jim's Case and Emily's case, identify the number and type of independent and dependent variables.

Accepted Answer

To provide an accurate answer to your question, I would need specific details about Jim's case and Emily's case, including the context of the study or experiment and the variables involved. Without this information, I can only give you a general explanation of independent and dependent variables.

In any research or experiment, an independent variable is the variable that is manipulated or changed by the researcher to observe its effect on the dependent variable. The dependent variable is the outcome or response that is measured to see if it is affected by changes in the independent variable.

For example, if Jim's case is a scientific experiment where he is testing the effect of different amounts of sunlight on plant growth, then:

- The independent variable would be the amount of sunlight the plants receive (since this is what Jim is changing).
- The dependent variable would be the growth of the plants (since this is what Jim is measuring and what may change in response to the sunlight).

Similarly, if Emily's case is a psychological study examining the impact of sleep on cognitive performance, then:

- The independent variable could be the amount of sleep participants get (since Emily would control this).
- The dependent variable would be the participants' performance on cognitive tasks (since this is what Emily is measuring and what may change in response to the amount of sleep).

To identify the number and type of independent and dependent variables in Jim's and Emily's cases, you would need to look at the design of their studies or experiments and determine what is being manipulated and what is being measured. If you can provide more details about their cases, I would be able to give a more specific answer.

Question 3

The __________ is used to determine if the population variances of two groups are equal.

Accepted Answer

A)  independent samples t-test 
B)  Levene's test 
C)  paired sample t-test 
D)  one-sample t-test 
A)  independent samples t-test 
B)  Levene's test 
C)  paired sample t-test 
D)  one-sample t-test B

Question 4

A paired-sample t-test can be used to examine the difference between males and females perception of marital satisfaction when the sample is made up of married couples.

Accepted Answer

A) True 
 B)False

Question 5

A one-sample t-test and a paired-sample t-tests have what in common?

Accepted Answer

A)  two groups being tested 
B)  measurements taken at two points in time 
C)  a dichotomous dependent variable 
D)  a continuous dependent variable 
A)  two groups being tested 
B)  measurements taken at two points in time 
C)  a dichotomous dependent variable 
D)  a continuous dependent variable

Question 6

Leo is performing a t-test to examine if there is a significant difference in cultural competency between a group of people who went through a diversity training and a group who did not complete the training. What is the dependent variable in this example?

Accepted Answer

A)  number of trainings attended 
B)  level of cultural competency 
C)  the control group 
D)  there is no dependent variable in this example 
A)  number of trainings attended 
B)  level of cultural competency 
C)  the control group 
D)  there is no dependent variable in this example

Question 7

A t-test which examines the difference between a group of males and a group of females on a biology test has two independent variables.

Accepted Answer

A) True 
 B)False

Question 8

When comparing means, you can look at the _______________ to determine if the difference is statistically significant.

Accepted Answer

A)  p-value 
B)  descriptive statistics 
C)  mean of each group 
D)  median of each group
True/False 
A)  p-value 
B)  descriptive statistics 
C)  mean of each group 
D)  median of each group
True/False

Question 9

A t-test assumes a continuous independent variable.

Accepted Answer

A) True 
 B)False

Question 10

Jamie is studying the perception of parental roles by surveying pairs of brothers and sisters. What type of research design describes this situation?

Accepted Answer

A)  matched-subject design 
B)  independent t-test 
C)  paired-sample design 
D)  repeated measures design 
A)  matched-subject design 
B)  independent t-test 
C)  paired-sample design 
D)  repeated measures design

Question 11

If you want to compare the level of knowledge about sexual harassment laws of the same group of people before and after training, the test you would use is a __________.

Accepted Answer

A)  before and after t-test 
B)  one-sample t-test 
C)  independent samples t-test 
D)  dependent sample t-test 
A)  before and after t-test 
B)  one-sample t-test 
C)  independent samples t-test 
D)  dependent sample t-test

Question 12

The independent samples t-test and paired-sample t-test both have ________________.

Accepted Answer

A)  a continuous dependent variable 
B)  a continuous independent variable 
C)  a dichotomous dependent variable 
D)  repeated measures design 
A)  a continuous dependent variable 
B)  a continuous independent variable 
C)  a dichotomous dependent variable 
D)  repeated measures design

Question 13

Jim's null hypothesis is that Rockwood Fire Department's response time is ___________ the 5 minute national standard.

Accepted Answer

A)  greater than 
B)  less than 
C)  equal to 
D)  not equal to 
A)  greater than 
B)  less than 
C)  equal to 
D)  not equal to

Question 14

With _________ cases the t-test is said to be fairly robust against the violation of normal distribution.

Accepted Answer

A)  less than 15 
B)  less than 40 
C)  40 or more 
D)  100 or more 
A)  less than 15 
B)  less than 40 
C)  40 or more 
D)  100 or more

Question 15

One assumption of the t-test, that is often violated, is the assumption that the data is ___________.

Accepted Answer

A)  normally distributed 
B)  collected by the researcher 
C)  not missing any responses 
D)  linear 
A)  normally distributed 
B)  collected by the researcher 
C)  not missing any responses 
D)  linear

Question 16

An appropriate test to use with a matched-subjects design is the ________________.

Accepted Answer

A)  one-sample t-test 
B)  independent samples t-test 
C)  paired-sample t-test 
D)  dependent-sample t-test 
A)  one-sample t-test 
B)  independent samples t-test 
C)  paired-sample t-test 
D)  dependent-sample t-test

Question 17

The one-sample t-test has a dichotomous independent variable.

Accepted Answer

A) True 
 B)False

Question 18

If the Levene's test is not significant, you must report the adjusted t-value.

Accepted Answer

A) True 
 B)False

Question 19

An independent samples t-test or paired sample t-test is used when you are comparing the means of _________ group(s).

Accepted Answer

A)  one 
B)  two 
C)  three 
D)  any number of 
A)  one 
B)  two 
C)  three 
D)  any number of

Question 20

Identify the three types of t-tests. For each type of t-test, identify a research question that could be tested using that t-test.

Accepted Answer

The three types of t-tests are independe

It is possible to violate the assumption of normal distribution and still have a robust result.

For Jim's Case and Emily's case, identify the number and type of independent and dependent variables.

The __________ is used to determine if the population variances of two groups are equal.

A paired-sample t-test can be used to examine the difference between males and females perception of marital satisfaction when the sample is made up of married couples.

A one-sample t-test and a paired-sample t-tests have what in common?

Leo is performing a t-test to examine if there is a significant difference in cultural competency between a group of people who went through a diversity training and a group who did not complete the training. What is the dependent variable in this example?

A t-test which examines the difference between a group of males and a group of females on a biology test has two independent variables.

When comparing means, you can look at the _______________ to determine if the difference is statistically significant.

A t-test assumes a continuous independent variable.

Jamie is studying the perception of parental roles by surveying pairs of brothers and sisters. What type of research design describes this situation?

If you want to compare the level of knowledge about sexual harassment laws of the same group of people before and after training, the test you would use is a __________.

The independent samples t-test and paired-sample t-test both have ________________.

Jim's null hypothesis is that Rockwood Fire Department's response time is ___________ the 5 minute national standard.

With _________ cases the t-test is said to be fairly robust against the violation of normal distribution.

One assumption of the t-test, that is often violated, is the assumption that the data is ___________.

An appropriate test to use with a matched-subjects design is the ________________.

The one-sample t-test has a dichotomous independent variable.

If the Levene's test is not significant, you must report the adjusted t-value.

An independent samples t-test or paired sample t-test is used when you are comparing the means of _________ group(s).

Identify the three types of t-tests. For each type of t-test, identify a research question that could be tested using that t-test.

When a Practitioner Becomes a Researcher

Research Alignment

Identifying the Focus of the Research

Research Design

Sample Selection

Data Collection

Quantitative Data Preparation and Descriptive Statistics

Hypothesis Testing and Statistical Significance

Comparing Means of More Than Two Groups

Bivariate Correlation

Chi-Square Analysis

Regression Analysis

Qualitative Data Analysis

Writing Reports

Using Research Methods for Continuous Improvement

Filters

Exam 9: Comparing Means Between Two Groups

It is possible to violate the assumption of normal distribution and still have a robust result.

For Jim's Case and Emily's case, identify the number and type of independent and dependent variables.

The __________ is used to determine if the population variances of two groups are equal.

A paired-sample t-test can be used to examine the difference between males and females perception of marital satisfaction when the sample is made up of married couples.

A one-sample t-test and a paired-sample t-tests have what in common?

Leo is performing a t-test to examine if there is a significant difference in cultural competency between a group of people who went through a diversity training and a group who did not complete the training. What is the dependent variable in this example?

A t-test which examines the difference between a group of males and a group of females on a biology test has two independent variables.

When comparing means, you can look at the _______________ to determine if the difference is statistically significant.

A t-test assumes a continuous independent variable.

Jamie is studying the perception of parental roles by surveying pairs of brothers and sisters. What type of research design describes this situation?

If you want to compare the level of knowledge about sexual harassment laws of the same group of people before and after training, the test you would use is a __________.

The independent samples t-test and paired-sample t-test both have ________________.

Jim's null hypothesis is that Rockwood Fire Department's response time is ___________ the 5 minute national standard.

With _________ cases the t-test is said to be fairly robust against the violation of normal distribution.

One assumption of the t-test, that is often violated, is the assumption that the data is ___________.

An appropriate test to use with a matched-subjects design is the ________________.

The one-sample t-test has a dichotomous independent variable.

If the Levene's test is not significant, you must report the adjusted t-value.

An independent samples t-test or paired sample t-test is used when you are comparing the means of _________ group(s).

Identify the three types of t-tests. For each type of t-test, identify a research question that could be tested using that t-test.

When a Practitioner Becomes a Researcher

Research Alignment

Identifying the Focus of the Research

Research Design

Sample Selection

Data Collection

Quantitative Data Preparation and Descriptive Statistics

Hypothesis Testing and Statistical Significance

Comparing Means of More Than Two Groups

Bivariate Correlation

Chi-Square Analysis

Regression Analysis

Qualitative Data Analysis

Writing Reports

Using Research Methods for Continuous Improvement

Filters