Question 1

What are the two basic assumptions of all parametric procedures?

Accepted Answer

The two basic assumptions of a

Question 2

If you have and $\bar{X}=50, \mu=43, \sigma=12$ $N=16$, 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 3

Given $\bar{X}=115, \mu=119, \sigma=20$ 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

Fail to reject the null hypoth

Question 4

State the hypotheses for a two-tailed test against a known population mean of 90.

Accepted Answer

None

Question 5

When experimental results are significant, this means the  ________ hypothesis has been ________ .

Accepted Answer

A) experimental; rejected 
B) alternative; rejected 
C) null; accepted 
D) null; rejected 
A) experimental; rejected 
B) alternative; rejected 
C) null; accepted 
D) null; rejected

Question 6

If $\bar{X}=82, \mu=79, \sigma_{X}=15$ and $N=25$, what is the value of $Z_{a b t}$ ?

Accepted Answer

The answer of If $\bar{X}=82, \mu=79, \sigma_{X}=15$ and $N=25$, what...

Question 7

Which of the following is true of any one-sample experiment?

Accepted Answer

A) We must know the population mean under the same condition of the independent variable as the one being tested. 
B) We must know the population mean under some condition of the independent variable other than the one being tested. 
C) We must know the sample mean under the condition of the independent variable being tested, but we do not need to know the population mean. 
D) We must know the sample mean under the condition of the independent variable being tested and under some other condition of the independent variable. 
A) We must know the population mean under the same condition of the independent variable as the one being tested. 
B) We must know the population mean under some condition of the independent variable other than the one being tested. 
C) We must know the sample mean under the condition of the independent variable being tested, but we do not need to know the population mean. 
D) We must know the sample mean under the condition of the independent variable being tested and under some other condition of the independent variable.

Question 8

If a sample mean is different from a particular population $\mu$ , we can conclude the sample mean probably represents some other population or else

Accepted Answer

A) the sample mean does not represent the sample statistic. 
B) an error was made in calculating the sample mean. 
C) an error was made in calculating standard error. 
D) the sample mean occurred as a result of sampling error. 
A) the sample mean does not represent the sample statistic. 
B) an error was made in calculating the sample mean. 
C) an error was made in calculating standard error. 
D) the sample mean occurred as a result of sampling error.

Question 9

Suppose a researcher has made a decision that a certain pill is not effective at treating depression when, in reality, it is.What has the researcher done in this case?

Accepted Answer

A) The researcher has made a Type II error. 
B) The researcher has made a Type I error. 
C) The researcher has made a correct decision to reject the null hypothesis. 
D) The researcher has made a correct decision to reject the alternative hypothesis. 
A) The researcher has made a Type II error. 
B) The researcher has made a Type I error. 
C) The researcher has made a correct decision to reject the null hypothesis. 
D) The researcher has made a correct decision to reject the alternative hypothesis.

What are the two basic assumptions of all parametric procedures?

If you have and $\bar{X}=50, \mu=43, \sigma=12$ $N=16$ , 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.

Given $\bar{X}=115, \mu=119, \sigma=20$ 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.

State the hypotheses for a two-tailed test against a known population mean of 90.

When experimental results are significant, this means the hypothesis has been .

If $\bar{X}=82, \mu=79, \sigma_{X}=15$ and $N=25$ , what is the value of $Z_{a b t}$ ?

Which of the following is true of any one-sample experiment?

If a sample mean is different from a particular population $\mu$ , we can conclude the sample mean probably represents some other population or else

Suppose a researcher has made a decision that a certain pill is not effective at treating depression when, in reality, it is.What has the researcher done in this case?

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

What are the two basic assumptions of all parametric procedures?

If you have and Xˉ=50,μ=43,σ=12\bar{X}=50, \mu=43, \sigma=12Xˉ=50,μ=43,σ=12 N=16N=16N=16 , 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.

Given Xˉ=115,μ=119,σ=20\bar{X}=115, \mu=119, \sigma=20Xˉ=115,μ=119,σ=20 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.

State the hypotheses for a two-tailed test against a known population mean of 90.

When experimental results are significant, this means the ________ hypothesis has been ________ .

If Xˉ=82,μ=79,σX=15\bar{X}=82, \mu=79, \sigma_{X}=15Xˉ=82,μ=79,σX​=15 and N=25N=25N=25 , what is the value of ZabtZ_{a b t}Zabt​ ?

Which of the following is true of any one-sample experiment?

If a sample mean is different from a particular population μ\muμ , we can conclude the sample mean probably represents some other population or else

Suppose a researcher has made a decision that a certain pill is not effective at treating depression when, in reality, it is.What has the researcher done in this case?

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 you have and $\bar{X}=50, \mu=43, \sigma=12$ $N=16$ , 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.

Given $\bar{X}=115, \mu=119, \sigma=20$ 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.

When experimental results are significant, this means the hypothesis has been .

If $\bar{X}=82, \mu=79, \sigma_{X}=15$ and $N=25$ , what is the value of $Z_{a b t}$ ?

If a sample mean is different from a particular population $\mu$ , we can conclude the sample mean probably represents some other population or else