Exam 9: Hypothesis Testing Using the Two-Sample T-Test

Suppose you perform a two-tailed independent-samples t-test, using α = 0.05, with 15 participants in one group and 16 participants in the other group.Your $t_{o b t}$ is 4.56, which is significant.What is the correct way to report this finding?

(Short Answer)

4.8/5

(29)

Question 21

When $H_{0}$ is true, what does the mean of the sampling distribution of differences between means equal?

(Short Answer)

4.8/5

(34)

Question 22

Suppose the average reading speed of 15 randomly selected elementary school students is 25, and the average reading speed of 15 randomly selected middle school students is 31.You compute an independent-samples t-test, and your $t_{o b t}$ is 5.72, which is statistically significant.What is the most appropriate conclusion?

(Essay)

4.9/5

(43)

Question 23

When calculating Cohen's d, how does the numerator differ from an independent-samples test versus a related samples t-test?

(Essay)

4.9/5

(39)

Question 24

What does the independent-samples t-test determine?

(Multiple Choice)

4.9/5

(36)

Question 25

What are we stating if we reject the null hypothesis for the independent-samples t-test?

(Multiple Choice)

4.7/5

(36)

Question 26

Suppose a researcher compares 50 pairs of husbands and wives on a variety of attitudes.In doing so, the researcher is making use of _ samples with a ______ design.

(Multiple Choice)

4.7/5

(33)

Question 27

The freshmen competed with the sophomores to see who could raise the most money by recycling.Each freshman was paired with a sophomore of the same gender.The appropriate design for testing the significance of the difference between the means is

(Multiple Choice)

4.7/5

(45)

Question 28

State the null hypothesis for a two-tailed independent samples experiment.

(Essay)

4.8/5

(36)

Question 29

Suppose you tested two age groups on the number of details they could recall from a paragraph.The mean for the older group is 16, and the mean for the younger group is 14.Further suppose you fail to reject the null hypothesis for this independent-samples t-test.What best accounts for the difference between these sample means?

(Short Answer)

4.8/5

(35)

Question 30

What is pooled variance?

(Multiple Choice)

4.9/5

(33)

Question 31

Suppose your t-obtained is 3.13 with 18 degrees of freedom.What is the squared point-biserial correlation coefficient?

(Short Answer)

4.8/5

(38)

Question 32

You have stated your alternative hypothesis as $S \bar{X}_{1}-\bar{X}_{2}$ $H_{a}: \mu_{1}-\mu_{2} \neq 0$ .If $\bar{X}_{1}$ = 23, $\bar{X}_{2}$ = 25, $n_{1}$ = 15, $n_{2}$ = 15, and = 0.90, what is $t_{o b t}$ ?

(Short Answer)

4.8/5

(28)

Question 33

Is a significant result also important? Briefly explain.

(Essay)

4.7/5

(29)

Question 34

The first 10 students who arrived for the Friday lecture filled out a questionnaire on their attitudes toward the instructor.The first 10 who were late for the lecture were spotted, and afterward filled out the same questionnaire. The appropriate design for testing the significance of the difference between the means is

(Multiple Choice)

4.7/5

(34)

Question 35

Suppose you read in a journal article, t43)= -3.31, p <.05.What would N be if this was an independent- versus a related samples t-test?

(Essay)

4.8/5

(29)

Question 36

N represents _, whereas n represents _.

(Multiple Choice)

4.9/5

(39)

Question 37

For a study with a related samples design and 30 participants in which each participant is measured twice repeated measures), what is the critical value? Assume a two-tailed test with α = .05.

(Short Answer)

4.8/5

(31)

Question 38

If a researcher predicts the experimental treatment will produce an increase in an independent-samples t-test $\bar{X}_{2}$ $\left(\bar{X}_{1}-\bar{X}_{2}<0\right)$ , how will the alternative hypothesis be stated?

(Essay)

4.8/5

(30)

Question 39

If = 20, $\sum D$ $\sum D^{2}$ = 220, and N = 10, what is $S \bar{D}$ ?

(Short Answer)

4.7/5

(37)

Question 40

Showing 21 - 40 of 49

Suppose you perform a two-tailed independent-samples t-test, using α = 0.05, with 15 participants in one group and 16 participants in the other group.Your $t_{o b t}$ is 4.56, which is significant.What is the correct way to report this finding?

When $H_{0}$ is true, what does the mean of the sampling distribution of differences between means equal?

When calculating Cohen's d, how does the numerator differ from an independent-samples test versus a related samples t-test?

What does the independent-samples t-test determine?

What are we stating if we reject the null hypothesis for the independent-samples t-test?

Suppose a researcher compares 50 pairs of husbands and wives on a variety of attitudes.In doing so, the researcher is making use of _ samples with a ______ design.

The freshmen competed with the sophomores to see who could raise the most money by recycling.Each freshman was paired with a sophomore of the same gender.The appropriate design for testing the significance of the difference between the means is

State the null hypothesis for a two-tailed independent samples experiment.

What is pooled variance?

Suppose your t-obtained is 3.13 with 18 degrees of freedom.What is the squared point-biserial correlation coefficient?

You have stated your alternative hypothesis as $S \bar{X}_{1}-\bar{X}_{2}$ $H_{a}: \mu_{1}-\mu_{2} \neq 0$ .If $\bar{X}_{1}$ = 23, $\bar{X}_{2}$ = 25, $n_{1}$ = 15, $n_{2}$ = 15, and = 0.90, what is $t_{o b t}$ ?

Is a significant result also important? Briefly explain.

Suppose you read in a journal article, t43)= -3.31, p <.05.What would N be if this was an independent- versus a related samples t-test?

N represents _, whereas n represents _.

For a study with a related samples design and 30 participants in which each participant is measured twice repeated measures), what is the critical value? Assume a two-tailed test with α = .05.

If a researcher predicts the experimental treatment will produce an increase in an independent-samples t-test $\bar{X}_{2}$ $\left(\bar{X}_{1}-\bar{X}_{2}<0\right)$ , how will the alternative hypothesis be stated?

If = 20, $\sum D$ $\sum D^{2}$ = 220, and N = 10, what is $S \bar{D}$ ?

Introduction to Statistics and Research

Creating and Using Frequency Distributions

Summarizing Scores With Measures of Central Tendency

Summarizing Scores With Measures of Variability

Describing Data With Z-Scores and the Normal Curve

Using Probability to Make Decisions About Data

Overview of Statistical Hypothesis Testing: the Z-Test

Hypothesis Testing Using the One-Sample T-Test

Describing Relationships Using Correlation and Regression

Hypothesis Testing Using the One-Way Analysis of Variance

Understanding the Two-Way Analysis of Variance

Chi Square and Nonparametric Procedures

Filters

Exam 9: Hypothesis Testing Using the Two-Sample T-Test

Suppose you perform a two-tailed independent-samples t-test, using α = 0.05, with 15 participants in one group and 16 participants in the other group.Your tobtt_{o b t}tobt​ is 4.56, which is significant.What is the correct way to report this finding?

When H0H_{0}H0​ is true, what does the mean of the sampling distribution of differences between means equal?

When calculating Cohen's d, how does the numerator differ from an independent-samples test versus a related samples t-test?

What does the independent-samples t-test determine?

What are we stating if we reject the null hypothesis for the independent-samples t-test?

Suppose a researcher compares 50 pairs of husbands and wives on a variety of attitudes.In doing so, the researcher is making use of _________________ samples with a ______________________ design.

The freshmen competed with the sophomores to see who could raise the most money by recycling.Each freshman was paired with a sophomore of the same gender.The appropriate design for testing the significance of the difference between the means is

State the null hypothesis for a two-tailed independent samples experiment.

What is pooled variance?

Suppose your t-obtained is 3.13 with 18 degrees of freedom.What is the squared point-biserial correlation coefficient?

Is a significant result also important? Briefly explain.

Suppose you read in a journal article, t43)= -3.31, p <.05.What would N be if this was an independent- versus a related samples t-test?

N represents _____, whereas n represents _____.

For a study with a related samples design and 30 participants in which each participant is measured twice repeated measures), what is the critical value? Assume a two-tailed test with α = .05.

If a researcher predicts the experimental treatment will produce an increase in an independent-samples t-test Xˉ2\bar{X}_{2}Xˉ2​ (Xˉ1−Xˉ2<0)\left(\bar{X}_{1}-\bar{X}_{2}<0\right)(Xˉ1​−Xˉ2​<0) , how will the alternative hypothesis be stated?

If = 20, ∑D\sum D∑D ∑D2\sum D^{2}∑D2 = 220, and N = 10, what is SDˉS \bar{D}SDˉ ?

Introduction to Statistics and Research

Creating and Using Frequency Distributions

Summarizing Scores With Measures of Central Tendency

Summarizing Scores With Measures of Variability

Describing Data With Z-Scores and the Normal Curve

Using Probability to Make Decisions About Data

Overview of Statistical Hypothesis Testing: the Z-Test

Hypothesis Testing Using the One-Sample T-Test

Describing Relationships Using Correlation and Regression

Hypothesis Testing Using the One-Way Analysis of Variance

Understanding the Two-Way Analysis of Variance

Chi Square and Nonparametric Procedures

Filters

Suppose you perform a two-tailed independent-samples t-test, using α = 0.05, with 15 participants in one group and 16 participants in the other group.Your $t_{o b t}$ is 4.56, which is significant.What is the correct way to report this finding?

When $H_{0}$ is true, what does the mean of the sampling distribution of differences between means equal?

Suppose a researcher compares 50 pairs of husbands and wives on a variety of attitudes.In doing so, the researcher is making use of _ samples with a ______ design.

N represents _, whereas n represents _.

If a researcher predicts the experimental treatment will produce an increase in an independent-samples t-test $\bar{X}_{2}$ $\left(\bar{X}_{1}-\bar{X}_{2}<0\right)$ , how will the alternative hypothesis be stated?

If = 20, $\sum D$ $\sum D^{2}$ = 220, and N = 10, what is $S \bar{D}$ ?