Question 1

For a directional research hypothesis,the null hypothesis is expressed in symbols as __________.

Accepted Answer

μ₁ ≤ μ₂ OR μ₁ ≥ μ₂ depending on the predicted direction

Question 2

The correct argument for using a two-tailed test,even if there is a clear basis for predicting a result in a given direction,is that

Accepted Answer

A) if the null hypothesis is in fact true,rejecting it will provide stronger evidence in support of it. 
B) one-tailed tests cannot be used in most studies involving one or two groups. 
C) if an unexpected result that is opposite of what is predicted occurs,it does not have to be ignored. 
D) a two-tailed test improves the chance of getting a statistically significant result. 
A) if the null hypothesis is in fact true,rejecting it will provide stronger evidence in support of it. 
B) one-tailed tests cannot be used in most studies involving one or two groups. 
C) if an unexpected result that is opposite of what is predicted occurs,it does not have to be ignored. 
D) a two-tailed test improves the chance of getting a statistically significant result. C

Question 3

The biggest complaint about significance tests is that they are

Accepted Answer

A) often misused. 
B) mathematically inconsistent. 
C) based on non-random samples. 
D) difficult to learn. 
A) often misused. 
B) mathematically inconsistent. 
C) based on non-random samples. 
D) difficult to learn. A

Question 4

The most widely used procedure of inferential statistics used in psychology is __________.

Accepted Answer

The answer of The most widely used procedure of inferential...

Question 5

A contrived statement set up to examine whether it can be rejected as part of the hypothesis-testing process is the __________.

Accepted Answer

The answer of A contrived statement set up to examine...

Question 6

The "cutoff sample score on the comparison distribution" is the point at which

Accepted Answer

A) if the null hypothesis is true,a result this extreme is unlikely. 
B) if the research hypothesis is true,a result this extreme is unlikely. 
C) the comparison distribution ends. 
D) the null hypothesis is accepted if the result is more extreme. 
A) if the null hypothesis is true,a result this extreme is unlikely. 
B) if the research hypothesis is true,a result this extreme is unlikely. 
C) the comparison distribution ends. 
D) the null hypothesis is accepted if the result is more extreme.

Question 7

A major misuse of significance tests is the tendency to

Accepted Answer

A) decide that if a result is not significant,the null hypothesis is shown to be true. 
B) decide that the null hypothesis is false when the results obtained are not significant. 
C) accept the research hypothesis when the results are not significant. 
D) claim that a non-significant result is the same as an unimportant result. 
A) decide that if a result is not significant,the null hypothesis is shown to be true. 
B) decide that the null hypothesis is false when the results obtained are not significant. 
C) accept the research hypothesis when the results are not significant. 
D) claim that a non-significant result is the same as an unimportant result.

Question 8

If the null hypothesis is rejected,the researcher can conclude that the results

Accepted Answer

A) support the research hypothesis. 
B) prove that the research hypothesis is true. 
C) are inconclusive. 
D) support the null hypothesis. 
A) support the research hypothesis. 
B) prove that the research hypothesis is true. 
C) are inconclusive. 
D) support the null hypothesis.

Question 9

A result that is statistically significant at the .05 level would be reported in a research article as

Accepted Answer

A) p = 5% B) p > .05 C) p < .05 D) p < t A) p = 5% B) p > .05 C) p < .05 D) p < t

Question 10

A nutritionist wants to determine whether people who regularly drink one protein shake per day have lower cholesterol than people in general.In the general population,cholesterol is normally distributed with μ = 190 and σ = 30.A person who has followed the protein shake regimen for two months is randomly selected,and his cholesterol is 135.The nutritionist reported this result as "p < .01".Is the nutritionist's claim accurate?
a.Use the five steps of hypothesis testing to verify the nutritionist's claim.
b.Explain the result to someone who is familiar with mean,SD,Z scores,normal curve percentages,probability,and samples and populations,but not with hypothesis testing.

Accepted Answer

A)Cutoff Z (.01 level,one-tailed-low)= -

Question 11

If a psychologist tests whether a new teaching method is more effective than the old one,the research hypothesis is that

Accepted Answer

A) the new teaching method is more effective than the old teaching method. 
B) the old teaching method is more effective than the new teaching method. 
C) there is no difference in effectiveness of the old and new teaching methods. 
D) there is a difference in effectiveness between the two methods,but no prediction is made. 
A) the new teaching method is more effective than the old teaching method. 
B) the old teaching method is more effective than the new teaching method. 
C) there is no difference in effectiveness of the old and new teaching methods. 
D) there is a difference in effectiveness between the two methods,but no prediction is made.

Question 12

In hypothesis testing,a statement that there is no difference between populations is the __________.

Accepted Answer

The answer of In hypothesis testing,a statement that there is...

Question 13

Hypothesis testing is a systematic procedure for determining whether results of an experiment conducted using a sample support a particular theory that is thought to be applicable to a(n)__________.

Accepted Answer

The answer of Hypothesis testing is a systematic procedure for...

Question 14

The null hypothesis will be rejected when the sample's score is more extreme than the __________ on the comparison distribution.

Accepted Answer

cutoff sam

Question 15

The general population (Population 2)has a mean of 30 and a standard deviation of 5,and the cutoff Z score for significance in a study involving one participant is 1.96.If the raw score obtained by the participant is 45,what decisions should be made about the null and research hypotheses?

Accepted Answer

Z = 3.00.Reject the

Question 16

Some researchers propose that significance testing should be banned and suggest using a different approach such as __________.

Accepted Answer

The answer of Some researchers propose that significance testing should...

Question 17

The research hypothesis predicting that one population will have higher scores than the other is a(n)__________ hypothesis.

Accepted Answer

directiona

Question 18

The general population (Population 2)has μ = 100 and σ = 8,and the cutoff Z score for significance in a study involving one participant is 1.64.If the raw score obtained by the participant is 110,what decisions should be made about the null and research hypotheses?

Accepted Answer

Z = 1.25.Do not reje

Question 19

In psychological research,the 1% and 5% levels are the __________ levels of significance.

Accepted Answer

convention

Question 20

If the cutoff Z score on the comparison distribution is ±2.31,a psychologist can reject the null hypothesis if the sample Z score on this distribution is

Accepted Answer

A) -2.16 
B) -1.41 
C) 2.16 
D) 2.83 
A) -2.16 
B) -1.41 
C) 2.16 
D) 2.83

For a directional research hypothesis,the null hypothesis is expressed in symbols as __________.

The correct argument for using a two-tailed test,even if there is a clear basis for predicting a result in a given direction,is that

The biggest complaint about significance tests is that they are

The most widely used procedure of inferential statistics used in psychology is __________.

A contrived statement set up to examine whether it can be rejected as part of the hypothesis-testing process is the __________.

The "cutoff sample score on the comparison distribution" is the point at which

A major misuse of significance tests is the tendency to

If the null hypothesis is rejected,the researcher can conclude that the results

A result that is statistically significant at the .05 level would be reported in a research article as

If a psychologist tests whether a new teaching method is more effective than the old one,the research hypothesis is that

In hypothesis testing,a statement that there is no difference between populations is the __________.

Hypothesis testing is a systematic procedure for determining whether results of an experiment conducted using a sample support a particular theory that is thought to be applicable to a(n)__________.

The null hypothesis will be rejected when the sample's score is more extreme than the __________ on the comparison distribution.

The general population (Population 2)has a mean of 30 and a standard deviation of 5,and the cutoff Z score for significance in a study involving one participant is 1.96.If the raw score obtained by the participant is 45,what decisions should be made about the null and research hypotheses?

Some researchers propose that significance testing should be banned and suggest using a different approach such as __________.

The research hypothesis predicting that one population will have higher scores than the other is a(n)__________ hypothesis.

The general population (Population 2)has μ = 100 and σ = 8,and the cutoff Z score for significance in a study involving one participant is 1.64.If the raw score obtained by the participant is 110,what decisions should be made about the null and research hypotheses?

In psychological research,the 1% and 5% levels are the __________ levels of significance.

If the cutoff Z score on the comparison distribution is ±2.31,a psychologist can reject the null hypothesis if the sample Z score on this distribution is

Displaying the Order in a Group of Numbers

Central Tendency and Variability

Some Key Ingredients for Inferential Statistics: Z Scores,the Normal Curve, Sample Versus Population, and Probability

Hypothesis Tests With Means of Samples

Making Sense of Statistical Significance:decision Errors, Effect Size, and Statistical Power

Introduction to T Tests: Single Sample and Dependent Means

The T Test for Independent Means

Introduction to the Analysis of Variance

Factorial Analysis of Variance

Correlation

Prediction

Chi-Square Tests

Strategies When Population Distributions Are Not Normal: Data Transformations and Rank-Order Tests

The General Linear Model and Making Sense of Advanced Statistical Procedures in Research Articles

Filters

Exam 4: Introduction to Hypothesis Testing

For a directional research hypothesis,the null hypothesis is expressed in symbols as __________.

The correct argument for using a two-tailed test,even if there is a clear basis for predicting a result in a given direction,is that

The biggest complaint about significance tests is that they are

The most widely used procedure of inferential statistics used in psychology is __________.

A contrived statement set up to examine whether it can be rejected as part of the hypothesis-testing process is the __________.

The "cutoff sample score on the comparison distribution" is the point at which

A major misuse of significance tests is the tendency to

If the null hypothesis is rejected,the researcher can conclude that the results

A result that is statistically significant at the .05 level would be reported in a research article as

If a psychologist tests whether a new teaching method is more effective than the old one,the research hypothesis is that

In hypothesis testing,a statement that there is no difference between populations is the __________.

Hypothesis testing is a systematic procedure for determining whether results of an experiment conducted using a sample support a particular theory that is thought to be applicable to a(n)__________.

The null hypothesis will be rejected when the sample's score is more extreme than the __________ on the comparison distribution.

The general population (Population 2)has a mean of 30 and a standard deviation of 5,and the cutoff Z score for significance in a study involving one participant is 1.96.If the raw score obtained by the participant is 45,what decisions should be made about the null and research hypotheses?

Some researchers propose that significance testing should be banned and suggest using a different approach such as __________.

The research hypothesis predicting that one population will have higher scores than the other is a(n)__________ hypothesis.

The general population (Population 2)has μ = 100 and σ = 8,and the cutoff Z score for significance in a study involving one participant is 1.64.If the raw score obtained by the participant is 110,what decisions should be made about the null and research hypotheses?

In psychological research,the 1% and 5% levels are the __________ levels of significance.

If the cutoff Z score on the comparison distribution is ±2.31,a psychologist can reject the null hypothesis if the sample Z score on this distribution is

Displaying the Order in a Group of Numbers

Central Tendency and Variability

Some Key Ingredients for Inferential Statistics: Z Scores,the Normal Curve, Sample Versus Population, and Probability

Hypothesis Tests With Means of Samples

Making Sense of Statistical Significance:decision Errors, Effect Size, and Statistical Power

Introduction to T Tests: Single Sample and Dependent Means

The T Test for Independent Means

Introduction to the Analysis of Variance

Factorial Analysis of Variance

Correlation

Prediction

Chi-Square Tests

Strategies When Population Distributions Are Not Normal: Data Transformations and Rank-Order Tests

The General Linear Model and Making Sense of Advanced Statistical Procedures in Research Articles

Filters