Question 1

______is ____to as sample is to statistic

Accepted Answer

A)  Descriptive; inferential 
B)  Population; parameter 
C)  Inferential; descriptive 
D)  Parameter; population 
A)  Descriptive; inferential 
B)  Population; parameter 
C)  Inferential; descriptive 
D)  Parameter; population

Question 2

The sampling distribution of the mean is important for

Accepted Answer

A)  descriptive statistics. 
B)  determining what type of inferential test is appropriate. 
C)  determining if a given sample mean is rare in hypothesis testing. 
D)  determining the mean of a sample. 
A)  descriptive statistics. 
B)  determining what type of inferential test is appropriate. 
C)  determining if a given sample mean is rare in hypothesis testing. 
D)  determining the mean of a sample.

Question 3

Justine conducted an analysis of variance test to determine if children playing video games were more aggressive than those who played either a racing game or a word game. The results of her test are as follows: F2, 47) = 14.80, p = .02. What can you conclude from these findings?

Accepted Answer

A)  her results were not significant 
B)  her overall result was statistically significant 
C)  she should conduct post-hoc tests 
D)  both 'b' and 'c' are true 
A)  her results were not significant 
B)  her overall result was statistically significant 
C)  she should conduct post-hoc tests 
D)  both 'b' and 'c' are true

Question 4

Stan is conducting a class research project in which he randomly assigns participants to two groups: one group of participants remains sober during the study and the other group of participants consumes 2 ounces of 75 proof alcohol. The dependent or outcome variable is manual dexterity. What statistical test should Stan use to determine whether the two groups differ in manual dexterity after the manipulation?

Accepted Answer

A)  independent samples t test 
B)  correlated t test 
C)  chi square 
D)  two-way analysis of variance 
A)  independent samples t test 
B)  correlated t test 
C)  chi square 
D)  two-way analysis of variance

Question 5

Other factors remaining constant, what happens as you move from a 95% level of confidence to a 99% level of confidence?

Accepted Answer

A)  The 99% interval is wider 
B)  The 99% interval is more narrow 
C)  The 99% interval contains fewer values 
D)  None of the above 
A)  The 99% interval is wider 
B)  The 99% interval is more narrow 
C)  The 99% interval contains fewer values 
D)  None of the above

Question 6

Rather than using a single score as an estimate of the population mean we may choose to identify a range of values that likely contains the mean value. What is this type of estimation called?

Accepted Answer

A)  Interval estimation 
B)  Point estimation 
C)  Mean range estimate 
D)  Probability estimation 
A)  Interval estimation 
B)  Point estimation 
C)  Mean range estimate 
D)  Probability estimation

Question 7

The _____hypothesis is the hypothesis that the research is trying to provide evidence for in hypothesis testing.

Accepted Answer

A)  null 
B)  population 
C)  critical 
D)  alternative 
A)  null 
B)  population 
C)  critical 
D)  alternative

Question 8

Dr. Yung tests a new anti-malaria drug in an Asian population and concludes that he cannot reject the null hypothesis, and must conclude he does not have sufficient evidence to conclude that the drug works. In reality, the drug does work. Dr. Yung has committed a error.

Accepted Answer

A)  logical 
B)  Type I false positive) 
C)  Type II false negative) 
D)  statistical 
A)  logical 
B)  Type I false positive) 
C)  Type II false negative) 
D)  statistical

Question 9

The independent samples t test discussed in the text is used to determine whether

Accepted Answer

A)  the experimenter administered different treatments. 
B)  the difference between two group means is statistically significant. 
C)  the control group performed as expected. 
D)  the participants were randomly selected from their respective populations. 
A)  the experimenter administered different treatments. 
B)  the difference between two group means is statistically significant. 
C)  the control group performed as expected. 
D)  the participants were randomly selected from their respective populations.

Question 10

Jessica hypothesizes that her manipulation of temperature in an auditorium will increase the number of students who doze off in a lecture. She is interested in a____ hypothesis.

Accepted Answer

A)  two tailed 
B)  uniform 
C)  directional research 
D)  preconceived 
A)  two tailed 
B)  uniform 
C)  directional research 
D)  preconceived

Question 11

Hypothesis testing is a type of inferential statistics. The inference is about

Accepted Answer

A)  characteristics of a sample based on information about the population. 
B)  probabilities of several specific data points. 
C)  the amount of variability within groups. 
D)  characteristics of a population based on sample data. 
A)  characteristics of a sample based on information about the population. 
B)  probabilities of several specific data points. 
C)  the amount of variability within groups. 
D)  characteristics of a population based on sample data.

Question 12

Hypothesis testing is

Accepted Answer

A)  a method of making inferences about population parameters based on sample data. 
B)  a method that allows you to "reject" or "fail to reject" the null hypothesis. 
C)  a method that allows you to "tentatively accept the alternative hypothesis" when the null hypothesis is rejected. 
D)  all of the above. 
A)  a method of making inferences about population parameters based on sample data. 
B)  a method that allows you to "reject" or "fail to reject" the null hypothesis. 
C)  a method that allows you to "tentatively accept the alternative hypothesis" when the null hypothesis is rejected. 
D)  all of the above.

Question 13

How many null hypotheses are tested in a two-way analysis of variance?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Question 14

Using the mean of a sample to estimate the mean of a population is called

Accepted Answer

A)  interval estimation. 
B)  point estimation. 
C)  sample mean estimation. 
D)  population mean estimation. 
A)  interval estimation. 
B)  point estimation. 
C)  sample mean estimation. 
D)  population mean estimation.

Question 15

When performing a t test for correlation coefficients the null hypothesis would state that

Accepted Answer

A)  there is no correlation between the two variables in the population. 
B)  there is a significant correlation between the variables in the population. 
C)  the correlation between the two variables is not equal to zero. 
D)  the observed correlation between the two variables in the sample is zero. 
A)  there is no correlation between the two variables in the population. 
B)  there is a significant correlation between the variables in the population. 
C)  the correlation between the two variables is not equal to zero. 
D)  the observed correlation between the two variables in the sample is zero.

Question 16

According to the steps of hypothesis testing provided in your text, if you are using an independent samples t test, which of the following describes your procedure:

Accepted Answer

A)  State your null and alternative hypotheses, determine the degrees of freedom, calculate your t test score, reject the null hypothesis if the p value is greater than the significance/alpha level. _____ 
B)  Calculate your t test score, determine the degrees of freedom, run the statistical program and get the p value, reject the null hypothesis if the p is greater than the alpha level. _____ 
C)  Select your significance level, determine the degrees of freedom, calculate your t test score, get the critical t value, reject the null hypothesis if the calculated t value is less than the critical t value. _____ 
D)  State the null and the alternative hypotheses; set the alpha level; conduct the statistical test and obtain the p value based on your empirical data; compare your p value to the alpha level and make a decision 1. reject the null versus 2. fail to reject the null); last, interpret findings. . 
A)  State your null and alternative hypotheses, determine the degrees of freedom, calculate your t test score, reject the null hypothesis if the p value is greater than the significance/alpha level. _____ 
B)  Calculate your t test score, determine the degrees of freedom, run the statistical program and get the p value, reject the null hypothesis if the p is greater than the alpha level. _____ 
C)  Select your significance level, determine the degrees of freedom, calculate your t test score, get the critical t value, reject the null hypothesis if the calculated t value is less than the critical t value. _____ 
D)  State the null and the alternative hypotheses; set the alpha level; conduct the statistical test and obtain the p value based on your empirical data; compare your p value to the alpha level and make a decision 1. reject the null versus 2. fail to reject the null); last, interpret findings. .

Question 17

Suppose one experimenter decides to test a treatment with only one experimental group and one control group, while another experimenter tests different levels of the same treatment with three different groups of participants. How will this affect the way in which the two experimenters conduct their statistical analysis?

Accepted Answer

A)  this will not make a difference in how they analyze their data 
B)  the first should use a lower significance level than the second 
C)  the second should analyze differences in groups means while the first should analyze differences in group variability 
D)  the first would conduct a t test, while the second would start with an analysis of variance and if significant) then conduct post hoc tests to determine which groups are significantly different. 
A)  this will not make a difference in how they analyze their data 
B)  the first should use a lower significance level than the second 
C)  the second should analyze differences in groups means while the first should analyze differences in group variability 
D)  the first would conduct a t test, while the second would start with an analysis of variance and if significant) then conduct post hoc tests to determine which groups are significantly different.

Question 18

Suppose you perform an experiment that compares the performance of an experimental group and a control group. You find that the mean of the experimental group is higher than the mean of the control group. Does this prove that the treatment enhanced performance?

Accepted Answer

A)  Yes, because the experimental group did better as a whole than the control group 
B)  No, because you must compare variances, not means 
C)  No, because the difference between the group could have occurred by chance, even if it was not very likely i.e., less than .05) 
D)  Yes, because group averages are the traditional measure to use to compare two groups 
A)  Yes, because the experimental group did better as a whole than the control group 
B)  No, because you must compare variances, not means 
C)  No, because the difference between the group could have occurred by chance, even if it was not very likely i.e., less than .05) 
D)  Yes, because group averages are the traditional measure to use to compare two groups

Question 19

A three-way ANOVA has ______independent variables.

Accepted Answer

A)  3 
B)  6 
C)  9 
D)  12 
A)  3 
B)  6 
C)  9 
D)  12

Question 20

When the null hypothesis is rejected, this provides support for

Accepted Answer

A)  your theory. 
B)  the alternative hypothesis. 
C)  the idea that the independent variable did not have an effect. 
D)  both 'b' and 'c'. 
A)  your theory. 
B)  the alternative hypothesis. 
C)  the idea that the independent variable did not have an effect. 
D)  both 'b' and 'c'.

__is to as sample is to statistic

The sampling distribution of the mean is important for

Justine conducted an analysis of variance test to determine if children playing video games were more aggressive than those who played either a racing game or a word game. The results of her test are as follows: F2, 47) = 14.80, p = .02. What can you conclude from these findings?

Other factors remaining constant, what happens as you move from a 95% level of confidence to a 99% level of confidence?

Rather than using a single score as an estimate of the population mean we may choose to identify a range of values that likely contains the mean value. What is this type of estimation called?

The _____hypothesis is the hypothesis that the research is trying to provide evidence for in hypothesis testing.

Dr. Yung tests a new anti-malaria drug in an Asian population and concludes that he cannot reject the null hypothesis, and must conclude he does not have sufficient evidence to conclude that the drug works. In reality, the drug does work. Dr. Yung has committed a error.

The independent samples t test discussed in the text is used to determine whether

Jessica hypothesizes that her manipulation of temperature in an auditorium will increase the number of students who doze off in a lecture. She is interested in a____ hypothesis.

Hypothesis testing is a type of inferential statistics. The inference is about

Hypothesis testing is

How many null hypotheses are tested in a two-way analysis of variance?

Using the mean of a sample to estimate the mean of a population is called

When performing a t test for correlation coefficients the null hypothesis would state that

According to the steps of hypothesis testing provided in your text, if you are using an independent samples t test, which of the following describes your procedure:

Suppose you perform an experiment that compares the performance of an experimental group and a control group. You find that the mean of the experimental group is higher than the mean of the control group. Does this prove that the treatment enhanced performance?

A three-way ANOVA has ______independent variables.

When the null hypothesis is rejected, this provides support for

Introduction to Scientific Research

Research Approaches and Methods of Data Collection

Problem Identification and Hypothesis Formation

Ethics

Measuring Variables and Sampling

Research Validity

Control Techniques in Experimental Research

Experimental Research Design

Procedure for Conducting an Experiment

Quasi-Experimental Designs

Single-Case Research Designs

Survey Research

Qualitative and Mixed Methods Research

Descriptive Statistics

Preparing the Research Report for Presentation or Publication

Filters

Exam 15: Inferential Statistics

______is ____to as sample is to statistic

The sampling distribution of the mean is important for

Justine conducted an analysis of variance test to determine if children playing video games were more aggressive than those who played either a racing game or a word game. The results of her test are as follows: F2, 47) = 14.80, p = .02. What can you conclude from these findings?

Other factors remaining constant, what happens as you move from a 95% level of confidence to a 99% level of confidence?

Rather than using a single score as an estimate of the population mean we may choose to identify a range of values that likely contains the mean value. What is this type of estimation called?

The _____hypothesis is the hypothesis that the research is trying to provide evidence for in hypothesis testing.

Dr. Yung tests a new anti-malaria drug in an Asian population and concludes that he cannot reject the null hypothesis, and must conclude he does not have sufficient evidence to conclude that the drug works. In reality, the drug does work. Dr. Yung has committed a error.

The independent samples t test discussed in the text is used to determine whether

Jessica hypothesizes that her manipulation of temperature in an auditorium will increase the number of students who doze off in a lecture. She is interested in a____ hypothesis.

Hypothesis testing is a type of inferential statistics. The inference is about

Hypothesis testing is

How many null hypotheses are tested in a two-way analysis of variance?

Using the mean of a sample to estimate the mean of a population is called

When performing a t test for correlation coefficients the null hypothesis would state that

According to the steps of hypothesis testing provided in your text, if you are using an independent samples t test, which of the following describes your procedure:

Suppose you perform an experiment that compares the performance of an experimental group and a control group. You find that the mean of the experimental group is higher than the mean of the control group. Does this prove that the treatment enhanced performance?

A three-way ANOVA has ______independent variables.

When the null hypothesis is rejected, this provides support for

Introduction to Scientific Research

Research Approaches and Methods of Data Collection

Problem Identification and Hypothesis Formation

Ethics

Measuring Variables and Sampling

Research Validity

Control Techniques in Experimental Research

Experimental Research Design

Procedure for Conducting an Experiment

Quasi-Experimental Designs

Single-Case Research Designs

Survey Research

Qualitative and Mixed Methods Research

Descriptive Statistics

Preparing the Research Report for Presentation or Publication

Filters

__is to as sample is to statistic