Question 1

What are the assumptions for using parametric tests for hypothesis testing?

Accepted Answer

Parametric tests are significance tests ...

Question 2

Which of the following involves a test of k-independent-samples?

Accepted Answer

A)   Test of differences in the percent of men and women who are or are not members of Greek organizations on campus
B)   Test of the average incomes of magazine subscribers of Southern Living verses Better Homes and Gardens
C)   Test of whether the mean salary of professors at Metro University is higher than the national average for university professors
D)   Test of whether a change occurred in the likelihood of heart disease among people who switched to a diet high in fish
E)   Test of differences in ad recall among three experimental groups (each of which saw a different advertisement)  and a control group

Question 3

How can a researcher determine whether data meet the assumption of normality necessary for using parametric tests?

Accepted Answer

A)   Assess the level of significance
B)   Determine the probability of making a type II error
C)   Determine the probability of making a type I error
D)   Examine a normal probability plot
E)   Examine whether the distribution is bimodal or multimodal

Question 4

The region of acceptance and the region of rejection are determined by the _____.

Accepted Answer

A)   resistance level of the statistic
B)   statistical significance level
C)   substantive significance level
D)   reasonable doubt
E)   practical significance level

Question 5

If a data difference is NOT caused only by random sampling fluctuations,it is said to have _____.

Accepted Answer

A)   resistance
B)   statistical significance
C)   substantive significance
D)   reasonable doubt
E)   practical significance

Question 6

As one increases the significance level accepted for hypothesis testing,the probability of committing a type II error _____.

Accepted Answer

A)   increases
B)   decreases
C)   stays the same
D)   is rejected
E)   is accepted B

Question 7

Which of the following hypotheses is a null hypothesis?

Accepted Answer

A)   There is no difference in the monthly grocery bills of families with one child and families with two children
B)   Grocery bills vary according to the number of meals eaten outside the home
C)   Families with two children have significantly higher grocery bills than families with just one child
D)   There is a relationship between grocery bills and the number of people in a household
E)   The mean age in a household is predictive of the amount of money sent on food each month

Question 8

Statisticians recommend that the power of a test equal _____,that is,the probability that one will correctly reject a false null hypothesis.

Accepted Answer

A)   5%
B)   10%
C)   50%
D)   80%
E)   95%

Question 9

When conducting an ANOVA,if the F ratio is close to 1,which of the following interpretations is true?

Accepted Answer

A)   The null hypothesis is rejected
B)   There is no difference between the means of the groups examined
C)   The population means are unequal
D)   The between-groups variance is twice the within-groups variance
E)   All of the above are true

Question 10

_____ statistics considers subjective probability estimates while _____ statistics considers only objective estimates.

Accepted Answer

A)   Classical; Bayesian
B)   Inductive; deductive
C)   Bayesian; classical
D)   Descriptive; exploratory
E)   Exploratory; descriptive

Question 11

_____ tests are hypothesis testing procedures that assume that the variables are measured on a nominal or ordinal scale.

Accepted Answer

A)   Parameter
B)   Parametric
C)   Nonparametric
D)   Resistant
E)   Type I

Question 12

What type of hypothesis states that the sample statistic is not the same as the population statistic but is either greater than or less than,but not both?

Accepted Answer

A)   Null
B)   One-tailed
C)   Two-tailed
D)   Three-tailed
E)   None of the above

Question 13

Which of the following outcomes is roughly the equivalent of committing a type I error?

Accepted Answer

A)   Finding a guilty person guilty
B)   Finding a guilty person not guilty
C)   Finding an innocent person not guilty
D)   Finding an innocent person guilty
E)   None of the above

Question 14

Which type of error is also known as alpha?

Accepted Answer

A)   Type I error
B)   Type II error
C)   Beta error
D)   Standard error
E)   Demand error

Question 15

The level of significance chosen for hypothesis testing is based on _____.

Accepted Answer

A)   the desired level of confidence one wishes to have in the results
B)   the desired degree of precision
C)   how much risk of a type I error one is willing to accept
D)   the statistical test used
E)   whether the sample is a probability sample

Question 16

When sample sizes exceed _____,the t and Z distributions are virtually identical.

Accepted Answer

A)   120
B)   300
C)   500
D)   1000
E)   the t and Z distributions will never be identical A

Question 17

Hypothesis testing of the effectiveness of two experimental manipulations against a control group finds that there is a significant difference in the mean score by group and the null hypothesis is rejected.Which test below can be used to determine where a difference exists?

Accepted Answer

A)   ANOVA
B)   X2
C)   F ratio
D)   Z test
E)   Scheffe's S E

Question 18

ANOVA can be used as a parametric test of _____.

Accepted Answer

A)   one sample
B)   two-related samples
C)   two-unrelated samples
D)   k-independent samples
E)   all of the above

Question 19

Which of the following is NOT true of the Kruskal-Wallis test?

Accepted Answer

A)   It is a one-way analysis of variance by ranks
B)   It assumes random selection
C)   It assumes a continuous distribution
D)   It is used with two-related samples
E)   All of the above are true

Question 20

List the six-stage sequence for testing statistical significance.

Accepted Answer

The six stages in hypothesis testing are...

Exam 17: Hypothesis Testing

What are the assumptions for using parametric tests for hypothesis testing?

Correct AnswerverifiedParametric tests are significance tests ...View AnswerShow Answer

Which of the following involves a test of k-independent-samples?

Correct AnswerverifiedShow Answer

How can a researcher determine whether data meet the assumption of normality necessary for using parametric tests?

Correct AnswerverifiedShow Answer

The region of acceptance and the region of rejection are determined by the _____.

Correct AnswerverifiedShow Answer

If a data difference is NOT caused only by random sampling fluctuations,it is said to have _____.

Correct AnswerverifiedShow Answer

As one increases the significance level accepted for hypothesis testing,the probability of committing a type II error _____.

Correct AnswerverifiedB

Which of the following hypotheses is a null hypothesis?

Correct AnswerverifiedShow Answer

Statisticians recommend that the power of a test equal _____,that is,the probability that one will correctly reject a false null hypothesis.

Correct AnswerverifiedShow Answer

When conducting an ANOVA,if the F ratio is close to 1,which of the following interpretations is true?

Correct AnswerverifiedShow Answer

_____ statistics considers subjective probability estimates while _____ statistics considers only objective estimates.

Correct AnswerverifiedShow Answer

_____ tests are hypothesis testing procedures that assume that the variables are measured on a nominal or ordinal scale.

Correct AnswerverifiedShow Answer

What type of hypothesis states that the sample statistic is not the same as the population statistic but is either greater than or less than,but not both?

Correct AnswerverifiedShow Answer

Which of the following outcomes is roughly the equivalent of committing a type I error?

Correct AnswerverifiedShow Answer

Which type of error is also known as alpha?

Correct AnswerverifiedShow Answer

The level of significance chosen for hypothesis testing is based on _____.

Correct AnswerverifiedShow Answer

When sample sizes exceed _____,the t and Z distributions are virtually identical.

Correct AnswerverifiedA

Hypothesis testing of the effectiveness of two experimental manipulations against a control group finds that there is a significant difference in the mean score by group and the null hypothesis is rejected.Which test below can be used to determine where a difference exists?

Correct AnswerverifiedE

ANOVA can be used as a parametric test of _____.

Correct AnswerverifiedShow Answer

Which of the following is NOT true of the Kruskal-Wallis test?

Correct AnswerverifiedShow Answer

List the six-stage sequence for testing statistical significance.

Correct AnswerverifiedThe six stages in hypothesis testing are...View AnswerShow Answer

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Parametric tests are significance tests ...
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B

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_ statistics considers subjective probability estimates while _ statistics considers only objective estimates.

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A

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E

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The six stages in hypothesis testing are...
View Answer