Exam 9: The Single-Sample T Test

When there is uncertainty about the parameters of a population of interest, a t distribution is used instead of a z distribution.Is the t distribution wider or thinner than the z distribution and why?

(Multiple Choice)

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Question 41

What is the correct formula for calculating the standard deviation of a sample when one is NOT trying to estimate the population standard deviation?

(Multiple Choice)

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Question 42

A sample of 20 with a standard deviation of 92.41 results in a standard error calculated as 20.66.

(True/False)

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Question 43

The final step in conducting the single-sample t test is:

(Multiple Choice)

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Question 44

What is the formula for the single-sample t statistic?

(Multiple Choice)

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Question 45

The t test is used when the mean and standard deviation of the population are known.

(True/False)

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Question 46

Griffin is looking through a statistics text for a z table, but he can find only a t table in the index.What tip would best help him find the information he needs?

(Multiple Choice)

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Question 47

The single-sample t test compares the mean of a sample to a population for which the mean and standard deviation is known.

(True/False)

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Question 48

An effect size of 0.53 was calculated on data after performing a hypothesis test with a single-sample t statistic in which the null hypothesis was rejected.What can be concluded about the results based on this information?

(Multiple Choice)

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Question 49

As degrees of freedom decrease, the critical cutoff for the t test decreases.

(True/False)

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Question 50

As degrees of freedom increase, the critical cutoff for the t test increases.

(True/False)

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Question 51

With very few degrees of freedom, the test statistic:

(Multiple Choice)

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Question 52

The first step in creating a dot plot is to determine the range of scores in the data set.

(True/False)

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Question 53

Critical t values _ as the degrees of freedom _.

(Multiple Choice)

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Question 54

Use the following to answer questions This figure represents the distribution of the percent of state residents living in a metropolitan area for all 50 U.S.states and Washington D.C. -(Figure: Percent Metropolitan) The figure indicates that:

(Multiple Choice)

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Question 55

What is one benefit of increasing the sample size when using t distributions?

(Multiple Choice)

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Question 56

When computing the confidence interval for a t test, the cutoffs for the 95 percent interval are always the same.

(True/False)

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Question 57

The _____ indicates the distance of a sample mean from a population mean in terms of the standard error.

(Multiple Choice)

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Question 58

Based on the statistical results provided, which would lead us to fail to reject the null hypothesis?

(Multiple Choice)

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Question 59

The correct formula for effect size using Cohen's d for a single-sample t test is:

(Multiple Choice)

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Question 60

Showing 41 - 60 of 124

When there is uncertainty about the parameters of a population of interest, a t distribution is used instead of a z distribution.Is the t distribution wider or thinner than the z distribution and why?

What is the correct formula for calculating the standard deviation of a sample when one is NOT trying to estimate the population standard deviation?

A sample of 20 with a standard deviation of 92.41 results in a standard error calculated as 20.66.

The final step in conducting the single-sample t test is:

What is the formula for the single-sample t statistic?

The t test is used when the mean and standard deviation of the population are known.

Griffin is looking through a statistics text for a z table, but he can find only a t table in the index.What tip would best help him find the information he needs?

The single-sample t test compares the mean of a sample to a population for which the mean and standard deviation is known.

An effect size of 0.53 was calculated on data after performing a hypothesis test with a single-sample t statistic in which the null hypothesis was rejected.What can be concluded about the results based on this information?

As degrees of freedom decrease, the critical cutoff for the t test decreases.

As degrees of freedom increase, the critical cutoff for the t test increases.

With very few degrees of freedom, the test statistic:

The first step in creating a dot plot is to determine the range of scores in the data set.

Critical t values _ as the degrees of freedom _.

Use the following to answer questions This figure represents the distribution of the percent of state residents living in a metropolitan area for all 50 U.S.states and Washington D.C. -(Figure: Percent Metropolitan) The figure indicates that:

What is one benefit of increasing the sample size when using t distributions?

When computing the confidence interval for a t test, the cutoffs for the 95 percent interval are always the same.

The _____ indicates the distance of a sample mean from a population mean in terms of the standard error.

Based on the statistical results provided, which would lead us to fail to reject the null hypothesis?

The correct formula for effect size using Cohen's d for a single-sample t test is:

An Introduction to Statistics and Research Design

Frequency Distributions

Visual Displays of Data

Central Tendency and Variability

Sampling and Probability

The Normal Curve, Standardization and Z Scores

Hypothesis Testing With Z Tests

Confidence Intervals, Effect Size, and Statistical Power

The Paired-Samples T Test

The Independent-Samples T Test

One-Way Between-Groups Anova

One-Way Within-Groups Anova

Two-Way Between-Groups Anova

Correlation

Regression

Chi-Square Tess

Choosing and Reporting Statistics

Filters

Exam 9: The Single-Sample T Test

When there is uncertainty about the parameters of a population of interest, a t distribution is used instead of a z distribution.Is the t distribution wider or thinner than the z distribution and why?

What is the correct formula for calculating the standard deviation of a sample when one is NOT trying to estimate the population standard deviation?

A sample of 20 with a standard deviation of 92.41 results in a standard error calculated as 20.66.

The final step in conducting the single-sample t test is:

What is the formula for the single-sample t statistic?

The t test is used when the mean and standard deviation of the population are known.

Griffin is looking through a statistics text for a z table, but he can find only a t table in the index.What tip would best help him find the information he needs?

The single-sample t test compares the mean of a sample to a population for which the mean and standard deviation is known.

An effect size of 0.53 was calculated on data after performing a hypothesis test with a single-sample t statistic in which the null hypothesis was rejected.What can be concluded about the results based on this information?

As degrees of freedom decrease, the critical cutoff for the t test decreases.

As degrees of freedom increase, the critical cutoff for the t test increases.

With very few degrees of freedom, the test statistic:

The first step in creating a dot plot is to determine the range of scores in the data set.

Critical t values _____ as the degrees of freedom _____.

Use the following to answer questions This figure represents the distribution of the percent of state residents living in a metropolitan area for all 50 U.S.states and Washington D.C. -(Figure: Percent Metropolitan) The figure indicates that:

What is one benefit of increasing the sample size when using t distributions?

When computing the confidence interval for a t test, the cutoffs for the 95 percent interval are always the same.

The _____ indicates the distance of a sample mean from a population mean in terms of the standard error.

Based on the statistical results provided, which would lead us to fail to reject the null hypothesis?

The correct formula for effect size using Cohen's d for a single-sample t test is:

An Introduction to Statistics and Research Design

Frequency Distributions

Visual Displays of Data

Central Tendency and Variability

Sampling and Probability

The Normal Curve, Standardization and Z Scores

Hypothesis Testing With Z Tests

Confidence Intervals, Effect Size, and Statistical Power

The Paired-Samples T Test

The Independent-Samples T Test

One-Way Between-Groups Anova

One-Way Within-Groups Anova

Two-Way Between-Groups Anova

Correlation

Regression

Chi-Square Tess

Choosing and Reporting Statistics

Filters

Critical t values _ as the degrees of freedom _.