Question 1

Describe the purpose and process of hypothesis testing.

Accepted Answer

Hypothesis testing is concerned with how...

Question 2

During significance testing, Dr. Gray looked at his data to see if the relationship between his independent and dependent variables was large enough to be meaningful. In doing so, he was investigating:

Accepted Answer

A)   Statistical significance
B)   Practical significance
C)   Probability significance
D)   Effect size significanceE) All of the above
F) B) and C)

Question 3

When a researcher wants to investigate the differences between two independent groups he can analyze the data using techniques. He can use the t Test for independent samples and:

Accepted Answer

A)   One-way analysis of variance
B)   t test for correlation coefficients
C)   Chi-square test for a contingency table
D)   t test for regression coefficientsE) A) and D)
F) A) and B)

Question 4

Draw the hypothesis-testing decision matrix and explain the contents.

Accepted Answer

The hypothesis-testing decision matrix i...

Question 5

Which of the following is the null hypothesis for testing the difference between two means for statistical significance?

Accepted Answer

A)   H0: µGRE-V = 476
B)   H0: µM = µF
C)   H0: βYX1X2 = 0
D)   H0: ρXY = 0E) B) and C)
F) None of the above

Question 6

Which of the following steps occurs first in hypothesis testing?

Accepted Answer

A)   Obtain the probability value
B)   Determine practical significance
C)   Set the significance level
D)   Compare the probability value with the significance levelE) B) and D)
F) A) and D)

Question 7

State how to decrease the probability of Type I and Type II errors.

Accepted Answer

To decrease the probability of Type I an...

Question 8

Explain the difference between the null hypothesis and the alternative hypothesis.

Accepted Answer

In the context of statistical hypothesis...

Question 9

Which of the following is the null hypothesis for testing a regression coefficient for statistical significance?

Accepted Answer

A)   H0: µGRE-V = 476
B)   H0: µM = µF
C)   H0: βYX1.X2 = 0
D)   H0: ρXY = 0E) A) and B)
F) A) and C)

Question 10

Which of the following symbols stands for the population mean?

Accepted Answer

A)   ρ
B)   μ
C)   SD
D)   σE) C) and D)
F) All of the above

Question 11

Increasing the sample size in a research study will _________ the study's power.

Accepted Answer

A)   decrease
B)   not impact
C)   increase
D)   be unrelated toE) All of the above
F) C) and D)

Question 12

The _____ is defined as the probability or your finding or a more extreme finding under the assumption that the null hypothesis is true.

Accepted Answer

A)   Alternative hypothesis
B)   Null hypothesis
C)   Probability value
D)   Significance levelE) None of the above
F) B) and D)

Question 13

Which of the following symbols represents a population parameter?

Accepted Answer

A)   SD
B)   σ
C)   r
D)   0E) B) and D)
F) None of the above

Question 14

Jean has conducted a study with an experimental and control group. She conducted an analysis of variance and found that there was a significant difference between the groups. How will she conduct post hoc tests?

Accepted Answer

A)   She will use the Bonferroni procedure
B)   She will look at the two group means and see which group scored higher
C)   She will calculate a correlation coefficient between the two groups
D)   She will conduct a independent samples t testE) A) and D)
F) A) and C)

Question 15

Random sampling is not an assumption in the use of inferential statistics.

Accepted Answer

A) True 
 B)False

Question 16

Dr. Callahan wrote in her report that the findings for her study were statistically significant. What did she mean?

Accepted Answer

A)   The results she observed from her research were most likely not due to chance
B)   The results of her research indicated that the alternate hypothesis was proven in this case
C)   The statistical analysis indicated that the null hypothesis will be completely inappropriate in all future studies
D)   The results she observed from her research were most likely due to chanceE) B) and C)
F) C) and D)

Question 17

An index (e.g., a mean or a correlation)  calculated with sample data is called a ______ whereas an index calculated with the complete set of population data (i.e., everyone in the population)  is called a _______.

Accepted Answer

A)   Statistic, Parameter
B)   Parameter, Statistic
C)   Sample, Population
D)   Population, SampleE) C) and D)
F) A) and B)

Question 18

A researcher has calculated the 95% confidence interval. What does that mean?

Accepted Answer

A)   The process she used captures the true population statistic 95% of the time in the long run
B)   She can be "95% confident" that her interval will include the population parameter
C)   She can be "5% confident" that her interval will includes the population parameter
D)   She can reject the null hypothesis.E) A) and C)
F) B) and D)

Question 19

Compare and contrast point estimation and interval estimation.

Accepted Answer

Point estimation and interval estimation...

Question 20

If a research finding is statistically significant, what else should you determine?

Accepted Answer

A)   The strength of significance
B)   The practical significance
C)   The probability value
D)   The alpha levelE) C) and D)
F) B) and C)

Exam 19: Inferential Statistics

Compare and contrast point estimation and interval estimation.

Correct AnswerAnswered by ExamLex AIPoint estimation and interval estimation...View AnswerShow Answer

Jean has conducted a study with an experimental and control group. She conducted an analysis of variance and found that there was a significant difference between the groups. How will she conduct post hoc tests?

Correct AnswerverifiedShow Answer

An index (e.g., a mean or a correlation) calculated with sample data is called a ______ whereas an index calculated with the complete set of population data (i.e., everyone in the population) is called a _______.

Correct AnswerverifiedShow Answer

Increasing the sample size in a research study will _________ the study's power.

Correct AnswerverifiedShow Answer

Which of the following is the null hypothesis for testing the difference between two means for statistical significance?

Correct AnswerverifiedShow Answer

State how to decrease the probability of Type I and Type II errors.

Correct AnswerAnswered by ExamLex AITo decrease the probability of Type I an...View AnswerShow Answer

Explain the difference between the null hypothesis and the alternative hypothesis.

Correct AnswerAnswered by ExamLex AIIn the context of statistical hypothesis...View AnswerShow Answer

Random sampling is not an assumption in the use of inferential statistics.

Correct AnswerverifiedShow Answer

Describe the purpose and process of hypothesis testing.

Correct AnswerverifiedHypothesis testing is concerned with how...View AnswerShow Answer

If a research finding is statistically significant, what else should you determine?

Correct AnswerverifiedShow Answer

Which of the following symbols stands for the population mean?

Correct AnswerverifiedShow Answer

When a researcher wants to investigate the differences between two independent groups he can analyze the data using techniques. He can use the t Test for independent samples and:

Correct AnswerAnswered by ExamLex AIShow Answer

During significance testing, Dr. Gray looked at his data to see if the relationship between his independent and dependent variables was large enough to be meaningful. In doing so, he was investigating:

Correct AnswerverifiedShow Answer

Which of the following is the null hypothesis for testing a regression coefficient for statistical significance?

Correct AnswerverifiedShow Answer

Dr. Callahan wrote in her report that the findings for her study were statistically significant. What did she mean?

Correct AnswerverifiedShow Answer

Which of the following symbols represents a population parameter?

Correct AnswerverifiedShow Answer

A researcher has calculated the 95% confidence interval. What does that mean?

Correct AnswerverifiedShow Answer

Which of the following steps occurs first in hypothesis testing?

Correct AnswerverifiedShow Answer

The _____ is defined as the probability or your finding or a more extreme finding under the assumption that the null hypothesis is true.

Correct AnswerverifiedShow Answer

Draw the hypothesis-testing decision matrix and explain the contents.

Correct AnswerAnswered by ExamLex AIThe hypothesis-testing decision matrix i...View AnswerShow Answer

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Point estimation and interval estimation...
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An index (e.g., a mean or a correlation) calculated with sample data is called a whereas an index calculated with the complete set of population data (i.e., everyone in the population) is called a _.

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To decrease the probability of Type I an...
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In the context of statistical hypothesis...
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Hypothesis testing is concerned with how...
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Answered by ExamLex AI
The hypothesis-testing decision matrix i...
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