Question 1

Replication involves conducting the same study with the same people multiple times.

Accepted Answer

A) True 
 B)False

Question 2

If a result is statistically significant, then chance is said NOT to account for the outcome.

Accepted Answer

A) True 
 B)False

Question 3

If one fails to reject the null hypothesis, it means that the results of the study are not statistically significant.

Accepted Answer

A) True 
 B)False

Question 4

To convert a person's percentile rank into a raw score, one needs to know the mean and standard:

Accepted Answer

A)  deviation for the population. 
B)  error of the sampling distribution. 
C)  deviation of the sample. 
D)  error of the population. 
A)  deviation for the population. 
B)  error of the sampling distribution. 
C)  deviation of the sample. 
D)  error of the population.

Question 5

The typical probability adopted by researchers to determine whether a result is extreme is:

Accepted Answer

A)  0.01. 
B)  0.05. 
C)  0.25. 
D)  0.50. 
A)  0.01. 
B)  0.05. 
C)  0.25. 
D)  0.50.

Question 6

The null hypothesis states that:

Accepted Answer

A)  the sample being studied is different from the population from which it was drawn. 
B)  nothing exists. 
C)  a difference exists between the populations being studied. 
D)  there are no differences between the populations being studied. 
A)  the sample being studied is different from the population from which it was drawn. 
B)  nothing exists. 
C)  a difference exists between the populations being studied. 
D)  there are no differences between the populations being studied.

Question 7

When multiple researchers recruit participants from various locations to replicate findings it is called:

Accepted Answer

A)  crowd-sourcing science. 
B)  stealing other researchers' work. 
C)  independent science. 
D)  new research. 
A)  crowd-sourcing science. 
B)  stealing other researchers' work. 
C)  independent science. 
D)  new research.

Question 8

When p < 0.05, the findings could be:

Accepted Answer

A)  statistically significant. 
B)  practically important. 
C)  clinically significant. 
D)  false. 
A)  statistically significant. 
B)  practically important. 
C)  clinically significant. 
D)  false.

Question 9

The crowdsourcing movement in research has led to open science.

Accepted Answer

A) True 
 B)False

Question 10

_____ requires that all members of a population have an equal chance of being selected for a study.

Accepted Answer

A)  Random selection 
B)  Random assignment 
C)  Normal distribution 
D)  Scale variable assumption 
A)  Random selection 
B)  Random assignment 
C)  Normal distribution 
D)  Scale variable assumption

Question 11

A parametric test is based on assumptions about the population.

Accepted Answer

A) True 
 B)False

Question 12

The behavioral sciences typically use alpha of 0.05.How do they represent this value and what does it mean?

Accepted Answer

A)  A p value, which means scores in the most extreme 2.5 percent on either end of the distribution, will be evidence to reject the null hypothesis. 
B)  A p value, which means scores 5 percent on either side of the mean, will be evidence to reject the null hypothesis. 
C)  A z statistic, which means scores in the most extreme 2.5 percent on either end of the distribution, will be evidence to reject the null hypothesis. 
D)  A z statistic, which means scores 5 percent on either side of the mean, will be evidence to reject the null hypothesis. 
A)  A p value, which means scores in the most extreme 2.5 percent on either end of the distribution, will be evidence to reject the null hypothesis. 
B)  A p value, which means scores 5 percent on either side of the mean, will be evidence to reject the null hypothesis. 
C)  A z statistic, which means scores in the most extreme 2.5 percent on either end of the distribution, will be evidence to reject the null hypothesis. 
D)  A z statistic, which means scores 5 percent on either side of the mean, will be evidence to reject the null hypothesis.

Question 13

A research study that meets all the assumptions of the parametric test used to analyze the data:

Accepted Answer

A)  continues with the performance of the appropriate nonparametric follow-up test. 
B)  has no bearing on the results of the research study. 
C)  produces higher quality results than does a research study that fails to meet some of the assumptions. 
D)  produces lower quality results than does a research study that fails to meet some of the assumptions. 
A)  continues with the performance of the appropriate nonparametric follow-up test. 
B)  has no bearing on the results of the research study. 
C)  produces higher quality results than does a research study that fails to meet some of the assumptions. 
D)  produces lower quality results than does a research study that fails to meet some of the assumptions.

Question 14

Philip is going to proceed with data analysis on a sample of scores that violate many assumptions about the population of interest.Which test would be more appropriate to use?

Accepted Answer

A)  parametric 
B)  nonparametric 
C)  skewed 
D)  biased 
A)  parametric 
B)  nonparametric 
C)  skewed 
D)  biased

Question 15

A z test result of -1.94 would allow one to reject the null hypothesis, assuming a two-tailed test with p = 0.05.

Accepted Answer

A) True 
 B)False

Question 16

The statement "It is hypothesized that children who participate in a mentoring program will score lower on depression tests compared to children who do not participate in a mentoring program" best illustrates a:

Accepted Answer

A)  one-tailed test. 
B)  two-tailed test. 
C)  null hypothesis. 
D)  z test. 
A)  one-tailed test. 
B)  two-tailed test. 
C)  null hypothesis. 
D)  z test.

Question 17

For a given population with a mean of 100 and a standard deviation of 20, a score of less than 80 is less likely to occur than a score of 80 based on 25 observations.

Accepted Answer

A) True 
 B)False

Question 18

A z score _____ the mean will always be _____.

Accepted Answer

A)  below; positive 
B)  above; negative 
C)  equal to; negative 
D)  equal to; zero 
A)  below; positive 
B)  above; negative 
C)  equal to; negative 
D)  equal to; zero

Question 19

A test is said to be _____ when it produces fairly accurate results even when the data suggest that the population might not meet some of the assumptions.

Accepted Answer

A)  parametric 
B)  nonparametric 
C)  nonlinear 
D)  robust 
A)  parametric 
B)  nonparametric 
C)  nonlinear 
D)  robust

Question 20

Which statement is NOT a general assumption of hypothesis testing specifically for the z test?

Accepted Answer

A)  The dependent variable is assessed using a scale measure. 
B)  The participants are randomly selected. 
C)  The distribution of the underlying population is bimodal. 
D)  The distribution of the underlying population is approximately normal. 
A)  The dependent variable is assessed using a scale measure. 
B)  The participants are randomly selected. 
C)  The distribution of the underlying population is bimodal. 
D)  The distribution of the underlying population is approximately normal.

Replication involves conducting the same study with the same people multiple times.

If a result is statistically significant, then chance is said NOT to account for the outcome.

If one fails to reject the null hypothesis, it means that the results of the study are not statistically significant.

To convert a person's percentile rank into a raw score, one needs to know the mean and standard:

The typical probability adopted by researchers to determine whether a result is extreme is:

The null hypothesis states that:

When multiple researchers recruit participants from various locations to replicate findings it is called:

When p < 0.05, the findings could be:

The crowdsourcing movement in research has led to open science.

_____ requires that all members of a population have an equal chance of being selected for a study.

A parametric test is based on assumptions about the population.

The behavioral sciences typically use alpha of 0.05.How do they represent this value and what does it mean?

A research study that meets all the assumptions of the parametric test used to analyze the data:

Philip is going to proceed with data analysis on a sample of scores that violate many assumptions about the population of interest.Which test would be more appropriate to use?

A z test result of -1.94 would allow one to reject the null hypothesis, assuming a two-tailed test with p = 0.05.

The statement "It is hypothesized that children who participate in a mentoring program will score lower on depression tests compared to children who do not participate in a mentoring program" best illustrates a:

For a given population with a mean of 100 and a standard deviation of 20, a score of less than 80 is less likely to occur than a score of 80 based on 25 observations.

A z score _ the mean will always be _.

A test is said to be _____ when it produces fairly accurate results even when the data suggest that the population might not meet some of the assumptions.

Which statement is NOT a general assumption of hypothesis testing specifically for the z test?

An Introduction to Statistics and Research Design

Frequency Distributions

Visual Displays of Data

Central Tendency and Variability

Sampling and Probability

The Normal Curve, Standardization and Z Scores

Confidence Intervals, Effect Size, and Statistical Power

The Single-Sample T Test

The Paired-Samples T Test

The Independent-Samples T Test

One-Way Between-Groups Anova

One-Way Within-Groups Anova

Two-Way Between-Groups Anova

Correlation

Regression

Chi-Square Tess

Choosing and Reporting Statistics

Filters

Exam 7: Hypothesis Testing With Z Tests

Replication involves conducting the same study with the same people multiple times.

If a result is statistically significant, then chance is said NOT to account for the outcome.

If one fails to reject the null hypothesis, it means that the results of the study are not statistically significant.

To convert a person's percentile rank into a raw score, one needs to know the mean and standard:

The typical probability adopted by researchers to determine whether a result is extreme is:

The null hypothesis states that:

When multiple researchers recruit participants from various locations to replicate findings it is called:

When p < 0.05, the findings could be:

The crowdsourcing movement in research has led to open science.

_____ requires that all members of a population have an equal chance of being selected for a study.

A parametric test is based on assumptions about the population.

The behavioral sciences typically use alpha of 0.05.How do they represent this value and what does it mean?

A research study that meets all the assumptions of the parametric test used to analyze the data:

Philip is going to proceed with data analysis on a sample of scores that violate many assumptions about the population of interest.Which test would be more appropriate to use?

A z test result of -1.94 would allow one to reject the null hypothesis, assuming a two-tailed test with p = 0.05.

The statement "It is hypothesized that children who participate in a mentoring program will score lower on depression tests compared to children who do not participate in a mentoring program" best illustrates a:

For a given population with a mean of 100 and a standard deviation of 20, a score of less than 80 is less likely to occur than a score of 80 based on 25 observations.

A z score _____ the mean will always be _____.

A test is said to be _____ when it produces fairly accurate results even when the data suggest that the population might not meet some of the assumptions.

Which statement is NOT a general assumption of hypothesis testing specifically for the z test?

An Introduction to Statistics and Research Design

Frequency Distributions

Visual Displays of Data

Central Tendency and Variability

Sampling and Probability

The Normal Curve, Standardization and Z Scores

Confidence Intervals, Effect Size, and Statistical Power

The Single-Sample T Test

The Paired-Samples T Test

The Independent-Samples T Test

One-Way Between-Groups Anova

One-Way Within-Groups Anova

Two-Way Between-Groups Anova

Correlation

Regression

Chi-Square Tess

Choosing and Reporting Statistics

Filters

A z score _ the mean will always be _.