Question 1

If $Z_{a b t}$ = -2.11 do you reject $H_{0}$ or fail to reject $H_{0}$ using a one-tailed test in the upper tail with α = .05?

Accepted Answer

The answer of If $Z_{a b t}$ = -2.11 do...

Question 2

Suppose you conduct an experiment, and the $Z_{a b t}$ is statistically nonsignificant at −0.65.How would you correctly report this result?

Accepted Answer

The answer of Suppose you conduct an experiment, and the...

Question 3

Which of the following accurately defines a Type I error?

Accepted Answer

A) Rejecting H0 when H0 is true 
B) Rejecting H0 when H0 is false 
C) Retaining H0 when H0 is true 
D) Retaining H0 when H0 is false 
A) Rejecting H0 when H0 is true 
B) Rejecting H0 when H0 is false 
C) Retaining H0 when H0 is true 
D) Retaining H0 when H0 is false

Question 4

Given and $\bar{X}=110, \mu=135, \sigma=15 \text {, }$ $N=121$, conduct a one-tailed z-test in the upper tail.Use α = .05.Be sure to set up your hypotheses and rejection region, calculate your z-score, and state your decision.

Accepted Answer

Fail to reject the null hypothesis.Becau

Question 5

When statisticians report results as nonsignificant, the results are

Accepted Answer

A) not due to chance. 
B) not important. 
C) not too unlikely to accept as representing the same population. 
D) different from what was expected or predicted. 
A) not due to chance. 
B) not important. 
C) not too unlikely to accept as representing the same population. 
D) different from what was expected or predicted.

Question 6

What is the typical alpha level selected by researchers?

Accepted Answer

A) .05 
B) 5 
C) .01 
D) .95 
A) .05 
B) 5 
C) .01 
D) .95

Question 7

If you read "z = -.33, p < .05" in a research journal, what does this mean?

Accepted Answer

There is a z-obtaine

Question 8

Suppose a researcher develops a drug designed to promote sleep.Those who take this drug, on average, sleep for
8.1 hours per night whereas those who do not take it sleep for 7.5 hours per night.In the context of this study, what would the null hypothesis suggest?

Accepted Answer

Despite the fact that the mean

Question 9

The power of a statistical test is the probability of

Accepted Answer

A) failing to reject a false H0 . 
B) failing to reject a true H0 . 
C) rejecting a false H0 . 
D) rejecting a true H0 . 
A) failing to reject a false H0 . 
B) failing to reject a true H0 . 
C) rejecting a false H0 . 
D) rejecting a true H0 .

Question 10

Inferential statistics are used to

Accepted Answer

A) decide whether sample data represent a particular relationship in the population. 
B) get rid of sampling error. 
C) improve sampling error. 
D) decide whether the population causes a particular relationship in the sample data. 
A) decide whether sample data represent a particular relationship in the population. 
B) get rid of sampling error. 
C) improve sampling error. 
D) decide whether the population causes a particular relationship in the sample data.

Question 11

Suppose you conduct an experiment, and your $Z_{a b t}$ is statistically significant at +3.45.How would you correctly report this result?

Accepted Answer

The answer of Suppose you conduct an experiment, and your...

Question 12

Which of the following accurately defines a Type II error?

Accepted Answer

A) Rejecting H0 when it is true 
B) Rejecting H0 when it is false 
C) Failing to reject H0 when it is true 
D) Failing to reject H0 when it is false 
A) Rejecting H0 when it is true 
B) Rejecting H0 when it is false 
C) Failing to reject H0 when it is true 
D) Failing to reject H0 when it is false

Question 13

A nonparametric procedure would not be done in conjunction with

Accepted Answer

A) ratio distributions. 
B) a skewed interval distribution. 
C) computing the median. 
D) computing the mode. 
A) ratio distributions. 
B) a skewed interval distribution. 
C) computing the median. 
D) computing the mode.

Question 14

If the probability that you will reject a $H_{0}$ that is false is 0.85, what is the probability you will commit a Type II error?

Accepted Answer

The answer of If the probability that you will reject...

Question 15

What is the difference between a significant result at the .05 level versus the .01 level?

Accepted Answer

The only difference is that th

Question 16

Given and $\bar{X}=115, \mu=119, \sigma=20$, $N=144$, conduct a two-tailed z-test.Use α = .01.Be sure to set up your hypotheses and rejection region, calculate your z-score, and state your decision.

Accepted Answer

Fail to reject the null hypoth

Question 17

If you have $\bar{X}=50, \mu=43, \sigma=12$ and $N=16$, conduct a two-tailed z-test.Use α = .05.Be sure to set up your hypotheses and rejection region, calculate your z-score, and state your decision.

Accepted Answer

Reject the null hypo

Question 18

If $Z_{a b t}$ = +2.21, do you reject $H_{0}$ or fail to reject $H_{0}$ using a one-tailed test in the upper tail with α = .05?

Accepted Answer

The answer of If $Z_{a b t}$ = +2.21, do...

Question 19

If you have $\bar{X}=17, \mu=21, \sigma=9$ and $N=16$, conduct a one-tailed z-test for a lower mean.Use α = .05.Be sure to set up your hypotheses and rejection region, calculate your z-score, and state your decision.

Accepted Answer

Reject the null hypo

Question 20

Which is not an assumption of a z-test?

Accepted Answer

A) The dependent variable is perfectly normal and must involve an interval scale. 
B) We know the mean of the population of raw scores under another condition of the independent variable. 
C) We have randomly selected one variable. 
D) We know the true standard deviation of the population. 
A) The dependent variable is perfectly normal and must involve an interval scale. 
B) We know the mean of the population of raw scores under another condition of the independent variable. 
C) We have randomly selected one variable. 
D) We know the true standard deviation of the population.

If $Z_{a b t}$ = -2.11 do you reject $H_{0}$ or fail to reject $H_{0}$ using a one-tailed test in the upper tail with α = .05?

Suppose you conduct an experiment, and the $Z_{a b t}$ is statistically nonsignificant at −0.65.How would you correctly report this result?

Which of the following accurately defines a Type I error?

Given and $\bar{X}=110, \mu=135, \sigma=15 \text {, }$ $N=121$ , conduct a one-tailed z-test in the upper tail.Use α = .05.Be sure to set up your hypotheses and rejection region, calculate your z-score, and state your decision.

When statisticians report results as nonsignificant, the results are

What is the typical alpha level selected by researchers?

If you read "z = -.33, p < .05" in a research journal, what does this mean?

Suppose a researcher develops a drug designed to promote sleep.Those who take this drug, on average, sleep for 8.1 hours per night whereas those who do not take it sleep for 7.5 hours per night.In the context of this study, what would the null hypothesis suggest?

The power of a statistical test is the probability of

Inferential statistics are used to

Suppose you conduct an experiment, and your $Z_{a b t}$ is statistically significant at +3.45.How would you correctly report this result?

Which of the following accurately defines a Type II error?

A nonparametric procedure would not be done in conjunction with

If the probability that you will reject a $H_{0}$ that is false is 0.85, what is the probability you will commit a Type II error?

What is the difference between a significant result at the .05 level versus the .01 level?

Given and $\bar{X}=115, \mu=119, \sigma=20$ , $N=144$ , conduct a two-tailed z-test.Use α = .01.Be sure to set up your hypotheses and rejection region, calculate your z-score, and state your decision.

If you have $\bar{X}=50, \mu=43, \sigma=12$ and $N=16$ , conduct a two-tailed z-test.Use α = .05.Be sure to set up your hypotheses and rejection region, calculate your z-score, and state your decision.

If $Z_{a b t}$ = +2.21, do you reject $H_{0}$ or fail to reject $H_{0}$ using a one-tailed test in the upper tail with α = .05?

If you have $\bar{X}=17, \mu=21, \sigma=9$ and $N=16$ , conduct a one-tailed z-test for a lower mean.Use α = .05.Be sure to set up your hypotheses and rejection region, calculate your z-score, and state your decision.

Which is not an assumption of a z-test?

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

Hypothesis Testing Using the One-Sample T-Test

Hypothesis Testing Using the Two-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 7: Overview of Statistical Hypothesis Testing: the Z-Test

If ZabtZ_{a b t}Zabt​ = -2.11 do you reject H0H_{0}H0​ or fail to reject H0H_{0}H0​ using a one-tailed test in the upper tail with α = .05?

Suppose you conduct an experiment, and the ZabtZ_{a b t}Zabt​ is statistically nonsignificant at −0.65.How would you correctly report this result?

Which of the following accurately defines a Type I error?

Given and Xˉ=110,μ=135,σ=15, \bar{X}=110, \mu=135, \sigma=15 \text {, }Xˉ=110,μ=135,σ=15, N=121N=121N=121 , conduct a one-tailed z-test in the upper tail.Use α = .05.Be sure to set up your hypotheses and rejection region, calculate your z-score, and state your decision.

When statisticians report results as nonsignificant, the results are

What is the typical alpha level selected by researchers?

If you read "z = -.33, p < .05" in a research journal, what does this mean?

Suppose a researcher develops a drug designed to promote sleep.Those who take this drug, on average, sleep for 8.1 hours per night whereas those who do not take it sleep for 7.5 hours per night.In the context of this study, what would the null hypothesis suggest?

The power of a statistical test is the probability of

Inferential statistics are used to

Suppose you conduct an experiment, and your ZabtZ_{a b t}Zabt​ is statistically significant at +3.45.How would you correctly report this result?

Which of the following accurately defines a Type II error?

A nonparametric procedure would not be done in conjunction with

If the probability that you will reject a H0H_{0}H0​ that is false is 0.85, what is the probability you will commit a Type II error?

What is the difference between a significant result at the .05 level versus the .01 level?

Given and Xˉ=115,μ=119,σ=20\bar{X}=115, \mu=119, \sigma=20Xˉ=115,μ=119,σ=20 , N=144N=144N=144 , conduct a two-tailed z-test.Use α = .01.Be sure to set up your hypotheses and rejection region, calculate your z-score, and state your decision.

If you have Xˉ=50,μ=43,σ=12\bar{X}=50, \mu=43, \sigma=12Xˉ=50,μ=43,σ=12 and N=16N=16N=16 , conduct a two-tailed z-test.Use α = .05.Be sure to set up your hypotheses and rejection region, calculate your z-score, and state your decision.

If ZabtZ_{a b t}Zabt​ = +2.21, do you reject H0H_{0}H0​ or fail to reject H0H_{0}H0​ using a one-tailed test in the upper tail with α = .05?

If you have Xˉ=17,μ=21,σ=9\bar{X}=17, \mu=21, \sigma=9Xˉ=17,μ=21,σ=9 and N=16N=16N=16 , conduct a one-tailed z-test for a lower mean.Use α = .05.Be sure to set up your hypotheses and rejection region, calculate your z-score, and state your decision.

Which is not an assumption of a z-test?

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

Hypothesis Testing Using the One-Sample T-Test

Hypothesis Testing Using the Two-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

If $Z_{a b t}$ = -2.11 do you reject $H_{0}$ or fail to reject $H_{0}$ using a one-tailed test in the upper tail with α = .05?

Suppose you conduct an experiment, and the $Z_{a b t}$ is statistically nonsignificant at −0.65.How would you correctly report this result?

Given and $\bar{X}=110, \mu=135, \sigma=15 \text {, }$ $N=121$ , conduct a one-tailed z-test in the upper tail.Use α = .05.Be sure to set up your hypotheses and rejection region, calculate your z-score, and state your decision.

Suppose you conduct an experiment, and your $Z_{a b t}$ is statistically significant at +3.45.How would you correctly report this result?

If the probability that you will reject a $H_{0}$ that is false is 0.85, what is the probability you will commit a Type II error?

Given and $\bar{X}=115, \mu=119, \sigma=20$ , $N=144$ , conduct a two-tailed z-test.Use α = .01.Be sure to set up your hypotheses and rejection region, calculate your z-score, and state your decision.

If you have $\bar{X}=50, \mu=43, \sigma=12$ and $N=16$ , conduct a two-tailed z-test.Use α = .05.Be sure to set up your hypotheses and rejection region, calculate your z-score, and state your decision.

If $Z_{a b t}$ = +2.21, do you reject $H_{0}$ or fail to reject $H_{0}$ using a one-tailed test in the upper tail with α = .05?

If you have $\bar{X}=17, \mu=21, \sigma=9$ and $N=16$ , conduct a one-tailed z-test for a lower mean.Use α = .05.Be sure to set up your hypotheses and rejection region, calculate your z-score, and state your decision.