Exam 10: Independent Groups T-Test

_____ represents the proportion of variability in the dependent variable that is not associated with the independent variable--that is,the proportion of variability that is due to disturbance variables.

(Multiple Choice)

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Question 21

The degrees of freedom for the independent groups t test are equal to n₁ - n₂ + 2.

(True/False)

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Question 22

If the variability of scores in the populations is held constant,then increasing sample sizes results in _____ in the standard error of the difference.

(Multiple Choice)

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Question 23

If the 95% confidence interval of a mean difference is -1 to 3,then the null hypothesis in the analysis was rejected.

(True/False)

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Question 24

Unexplained variance or error variance reflects the influence of:

(Multiple Choice)

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Question 25

What is a sampling distribution of the difference between two independent means?

(Essay)

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Question 26

Given that your calculated t is 5.09 and there was a total of 62 subjects the strength of the relationship is_________.

(Short Answer)

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Question 27

Suppose a researcher is reporting the results of an independent groups t test.If he obtained a statistically significant t value of 2.5 with 15 subjects in each group using an alpha level of .05,how would he report this in a psychological journal?

(Multiple Choice)

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Question 28

The test used to determine homogeneity of variance is called_________.

(Short Answer)

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Question 29

Dr.Osborn believes that taking calcium will improve bone density in women.She uses a between subjects design and gives the treatment group Calcium everyday and the placebo group a sugar pill.Her scientific or alternative hypothesis is_____.

(Multiple Choice)

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Question 30

A directional alternative hypothesis is written as_____.

(Multiple Choice)

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Question 31

The distribution of mean differences across all possible pairs of random samples of a given size represents a sampling distribution of the difference between two independent means.

(True/False)

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Question 32

The standard error of the difference indicates how much _____ will occur,on the average.

(Multiple Choice)

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Question 33

The independent groups t test is typically used to analyze the relationship between two variables when the independent variable has three or more levels.

(True/False)

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Question 34

The 95% confidence intervals are_____reported in APA results sections.

(Multiple Choice)

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Question 35

The t statistic follows a t distribution when:

(Multiple Choice)

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Question 36

If the assumption of homogeneity of variance is violated a nonparametric test has to be used.

(True/False)

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Question 37

The nature of the relationship in the independent groups t-test is determined by examining___.

(Short Answer)

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Question 38

The nature of the relationship in the independent groups t test is determined by examining:

(Multiple Choice)

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Question 39

For the t test to be considered robust to violations of certain assumptions,the samples should be ____.

(Multiple Choice)

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Question 40

Showing 21 - 40 of 149

_____ represents the proportion of variability in the dependent variable that is not associated with the independent variable--that is,the proportion of variability that is due to disturbance variables.

The degrees of freedom for the independent groups t test are equal to n₁ - n₂ + 2.

If the variability of scores in the populations is held constant,then increasing sample sizes results in _____ in the standard error of the difference.

If the 95% confidence interval of a mean difference is -1 to 3,then the null hypothesis in the analysis was rejected.

Unexplained variance or error variance reflects the influence of:

What is a sampling distribution of the difference between two independent means?

Given that your calculated t is 5.09 and there was a total of 62 subjects the strength of the relationship is_________.

Suppose a researcher is reporting the results of an independent groups t test.If he obtained a statistically significant t value of 2.5 with 15 subjects in each group using an alpha level of .05,how would he report this in a psychological journal?

The test used to determine homogeneity of variance is called_________.

Dr.Osborn believes that taking calcium will improve bone density in women.She uses a between subjects design and gives the treatment group Calcium everyday and the placebo group a sugar pill.Her scientific or alternative hypothesis is_____.

A directional alternative hypothesis is written as_____.

The distribution of mean differences across all possible pairs of random samples of a given size represents a sampling distribution of the difference between two independent means.

The standard error of the difference indicates how much _____ will occur,on the average.

The independent groups t test is typically used to analyze the relationship between two variables when the independent variable has three or more levels.

The 95% confidence intervals are_____reported in APA results sections.

The t statistic follows a t distribution when:

If the assumption of homogeneity of variance is violated a nonparametric test has to be used.

The nature of the relationship in the independent groups t-test is determined by examining___.

The nature of the relationship in the independent groups t test is determined by examining:

For the t test to be considered robust to violations of certain assumptions,the samples should be ____.

Introduction and Mathematical Preliminaries

Frequency and Probability Distributions

Measures of Central Tendency and Variability

Percentiles,percentile Ranks,standard Scores,and the Normal Distribution

Pearson Correlation and Regression: Descriptive Aspects

Probability

Estimation and Sampling Distributions

Hypothesis Testing: Inferences About a Single Mean

Principles of Research Design and Statistical Preliminaries for Analyzing Bivariate Relationships

Correlated Groups T-Test

One-Way Repeated Measures Analysis of Variance

Pearson Correlation and Regression: Inferential Aspects

Chi-Square Test

Nonparametric Statistics

Two-Way Between-Subjects Analysis of Variance

Overview and Extension: Statistical Tests for More Complex Designs

Filters

Exam 10: Independent Groups T-Test

_____ represents the proportion of variability in the dependent variable that is not associated with the independent variable--that is,the proportion of variability that is due to disturbance variables.

The degrees of freedom for the independent groups t test are equal to n1 - n2 + 2.

If the variability of scores in the populations is held constant,then increasing sample sizes results in _____ in the standard error of the difference.

If the 95% confidence interval of a mean difference is -1 to 3,then the null hypothesis in the analysis was rejected.

Unexplained variance or error variance reflects the influence of:

What is a sampling distribution of the difference between two independent means?

Given that your calculated t is 5.09 and there was a total of 62 subjects the strength of the relationship is_________.

Suppose a researcher is reporting the results of an independent groups t test.If he obtained a statistically significant t value of 2.5 with 15 subjects in each group using an alpha level of .05,how would he report this in a psychological journal?

The test used to determine homogeneity of variance is called_________.

Dr.Osborn believes that taking calcium will improve bone density in women.She uses a between subjects design and gives the treatment group Calcium everyday and the placebo group a sugar pill.Her scientific or alternative hypothesis is_____.

A directional alternative hypothesis is written as_____.

The distribution of mean differences across all possible pairs of random samples of a given size represents a sampling distribution of the difference between two independent means.

The standard error of the difference indicates how much _____ will occur,on the average.

The independent groups t test is typically used to analyze the relationship between two variables when the independent variable has three or more levels.

The 95% confidence intervals are_____reported in APA results sections.

The t statistic follows a t distribution when:

If the assumption of homogeneity of variance is violated a nonparametric test has to be used.

The nature of the relationship in the independent groups t-test is determined by examining___.

The nature of the relationship in the independent groups t test is determined by examining:

For the t test to be considered robust to violations of certain assumptions,the samples should be ____.

Introduction and Mathematical Preliminaries

Frequency and Probability Distributions

Measures of Central Tendency and Variability

Percentiles,percentile Ranks,standard Scores,and the Normal Distribution

Pearson Correlation and Regression: Descriptive Aspects

Probability

Estimation and Sampling Distributions

Hypothesis Testing: Inferences About a Single Mean

Principles of Research Design and Statistical Preliminaries for Analyzing Bivariate Relationships

Correlated Groups T-Test

One-Way Repeated Measures Analysis of Variance

Pearson Correlation and Regression: Inferential Aspects

Chi-Square Test

Nonparametric Statistics

Two-Way Between-Subjects Analysis of Variance

Overview and Extension: Statistical Tests for More Complex Designs

Filters

The degrees of freedom for the independent groups t test are equal to n₁ - n₂ + 2.