Exam 8: Introduction to Hypothesis Testing

A researcher conducts a hypothesis test to evaluate the effect of a treatment.The hypothesis test produces a z-score of z = 2.37.Assuming that the researcher is using a two-tailed test,what decision should be made?

(Multiple Choice)

4.8/5

(30)

Question 41

There is always a possibility that the decision reached in a hypothesis test is incorrect.

(True/False)

4.8/5

(34)

Question 42

Which of the following is an accurate definition for the power of a statistical test?

(Multiple Choice)

4.8/5

(34)

Question 43

If a hypothesis test leads to rejecting the null hypothesis,it means that the sample data failed to provide sufficient evidence to conclude that the treatment has an effect.

(True/False)

4.9/5

(35)

Question 44

A researcher administers a treatment to a sample of n = 16 selected from a population with  = 40 and  = 8.If the sample mean after treatment is M = 42,then Cohen's d = 1.00.

(True/False)

4.9/5

(38)

Question 45

Even if a treatment has an effect,it is still possible to obtain a sample mean that is very similar to the original population mean.What outcome is likely if this happens?

(Multiple Choice)

4.9/5

(33)

Question 46

If the power for a hypothesis test is calculated to be 0.80,then for same test,the probability of a Type II error is 0.20.

(True/False)

4.9/5

(29)

Question 47

You complete a hypothesis test using  = .05,and based on the evidence from the sample,your decision is to reject the null hypothesis.If the treatment actually has no effect,which of the following is true?

(Multiple Choice)

4.8/5

(29)

Question 48

A researcher selects a sample and administers a treatment to the individuals in the sample.If the sample is used for a hypothesis test,what does the alternative hypothesis (H₁)say about the treatment?

(Multiple Choice)

4.8/5

(35)

Question 49

Which of the following is directly addressed by the null hypothesis?

(Multiple Choice)

4.9/5

(30)

Question 50

Which of the following accurately describes the critical region?

(Multiple Choice)

4.8/5

(34)

Question 51

Which of the following will increase the power of a statistical test?

(Multiple Choice)

4.7/5

(39)

Question 52

If a hypothesis test produces a z-score in the critical region,what decision should be made?

(Multiple Choice)

4.7/5

(36)

Question 53

Which of the following correctly describes the effect of increasing the alpha level (for example,from .01 to .05)?

(Multiple Choice)

4.9/5

(32)

Question 54

You complete a hypothesis test using  = .05,and based on the evidence from the sample,your decision is to reject the null hypothesis.If the treatment actually does have an effect,which of the following is true?

(Multiple Choice)

4.8/5

(29)

Question 55

The alpha level determines the risk of a Type I error.

(True/False)

4.8/5

(33)

Question 56

What is the relationship between the alpha level,the size of the critical region,and the risk of a Type I error?

(Multiple Choice)

4.7/5

(31)

Question 57

A researcher administers a treatment to a sample of participants selected from a population with µ = 80.If the researcher obtains a sample mean of M = 88,which combination of factors is most likely to result in rejecting the null hypothesis?

(Multiple Choice)

4.9/5

(39)

Question 58

If all other factors are held constant,increasing the sample size from n = 25 to n = 100 will increase the power of a statistical test.

(True/False)

4.8/5

(33)

Question 59

Which of the following accurately describes the effect of increasing the sample size?

(Multiple Choice)

4.9/5

(34)

Question 60

Showing 41 - 60 of 81

A researcher conducts a hypothesis test to evaluate the effect of a treatment.The hypothesis test produces a z-score of z = 2.37.Assuming that the researcher is using a two-tailed test,what decision should be made?

There is always a possibility that the decision reached in a hypothesis test is incorrect.

Which of the following is an accurate definition for the power of a statistical test?

If a hypothesis test leads to rejecting the null hypothesis,it means that the sample data failed to provide sufficient evidence to conclude that the treatment has an effect.

A researcher administers a treatment to a sample of n = 16 selected from a population with  = 40 and  = 8.If the sample mean after treatment is M = 42,then Cohen's d = 1.00.

Even if a treatment has an effect,it is still possible to obtain a sample mean that is very similar to the original population mean.What outcome is likely if this happens?

If the power for a hypothesis test is calculated to be 0.80,then for same test,the probability of a Type II error is 0.20.

You complete a hypothesis test using  = .05,and based on the evidence from the sample,your decision is to reject the null hypothesis.If the treatment actually has no effect,which of the following is true?

A researcher selects a sample and administers a treatment to the individuals in the sample.If the sample is used for a hypothesis test,what does the alternative hypothesis (H₁)say about the treatment?

Which of the following is directly addressed by the null hypothesis?

Which of the following accurately describes the critical region?

Which of the following will increase the power of a statistical test?

If a hypothesis test produces a z-score in the critical region,what decision should be made?

Which of the following correctly describes the effect of increasing the alpha level (for example,from .01 to .05)?

You complete a hypothesis test using  = .05,and based on the evidence from the sample,your decision is to reject the null hypothesis.If the treatment actually does have an effect,which of the following is true?

The alpha level determines the risk of a Type I error.

What is the relationship between the alpha level,the size of the critical region,and the risk of a Type I error?

A researcher administers a treatment to a sample of participants selected from a population with µ = 80.If the researcher obtains a sample mean of M = 88,which combination of factors is most likely to result in rejecting the null hypothesis?

If all other factors are held constant,increasing the sample size from n = 25 to n = 100 will increase the power of a statistical test.

Which of the following accurately describes the effect of increasing the sample size?

Introduction to Statistics

Frequency Distributions

Measures of Central Tendency

Measures of Variability

Z-Scores

Probability

Probability and Samples:

Introduction to the T Statistic

The T Test for Two Independent Samples

The T Test for Two Related Samples

Introduction to Analysis of Variance

Repeated-Measures and Two-Factor Anova

Correlation and Regression

Chi-Square Tests

Filters

Exam 8: Introduction to Hypothesis Testing

A researcher conducts a hypothesis test to evaluate the effect of a treatment.The hypothesis test produces a z-score of z = 2.37.Assuming that the researcher is using a two-tailed test,what decision should be made?

There is always a possibility that the decision reached in a hypothesis test is incorrect.

Which of the following is an accurate definition for the power of a statistical test?

If a hypothesis test leads to rejecting the null hypothesis,it means that the sample data failed to provide sufficient evidence to conclude that the treatment has an effect.

A researcher administers a treatment to a sample of n = 16 selected from a population with  = 40 and  = 8.If the sample mean after treatment is M = 42,then Cohen's d = 1.00.

Even if a treatment has an effect,it is still possible to obtain a sample mean that is very similar to the original population mean.What outcome is likely if this happens?

If the power for a hypothesis test is calculated to be 0.80,then for same test,the probability of a Type II error is 0.20.

You complete a hypothesis test using  = .05,and based on the evidence from the sample,your decision is to reject the null hypothesis.If the treatment actually has no effect,which of the following is true?

A researcher selects a sample and administers a treatment to the individuals in the sample.If the sample is used for a hypothesis test,what does the alternative hypothesis (H1)say about the treatment?

Which of the following is directly addressed by the null hypothesis?

Which of the following accurately describes the critical region?

Which of the following will increase the power of a statistical test?

If a hypothesis test produces a z-score in the critical region,what decision should be made?

Which of the following correctly describes the effect of increasing the alpha level (for example,from .01 to .05)?

You complete a hypothesis test using  = .05,and based on the evidence from the sample,your decision is to reject the null hypothesis.If the treatment actually does have an effect,which of the following is true?

The alpha level determines the risk of a Type I error.

What is the relationship between the alpha level,the size of the critical region,and the risk of a Type I error?

A researcher administers a treatment to a sample of participants selected from a population with µ = 80.If the researcher obtains a sample mean of M = 88,which combination of factors is most likely to result in rejecting the null hypothesis?

If all other factors are held constant,increasing the sample size from n = 25 to n = 100 will increase the power of a statistical test.

Which of the following accurately describes the effect of increasing the sample size?

Introduction to Statistics

Frequency Distributions

Measures of Central Tendency

Measures of Variability

Z-Scores

Probability

Probability and Samples:

Introduction to the T Statistic

The T Test for Two Independent Samples

The T Test for Two Related Samples

Introduction to Analysis of Variance

Repeated-Measures and Two-Factor Anova

Correlation and Regression

Chi-Square Tests

Filters

A researcher selects a sample and administers a treatment to the individuals in the sample.If the sample is used for a hypothesis test,what does the alternative hypothesis (H₁)say about the treatment?