Question 1

In order to reject the null hypothesis when using the t distribution and small samples, we will

Accepted Answer

A)  need a smaller test statistic as compared to larger samples 
B)  need a larger test statistic as compared to larger samples 
C)  always use one-tailed tests 
D)  set alpha very low 
A)  need a smaller test statistic as compared to larger samples 
B)  need a larger test statistic as compared to larger samples 
C)  always use one-tailed tests 
D)  set alpha very low B

Question 2

The central problem in the case of one sample hypothesis test is to determine

Accepted Answer

A)  if a sample is random 
B)  if sample statistics are the same as those of the sampling distribution 
C)  if parameters are representative of population 
D)  if a sample came from a population with a certain characteristic 
A)  if a sample is random 
B)  if sample statistics are the same as those of the sampling distribution 
C)  if parameters are representative of population 
D)  if a sample came from a population with a certain characteristic D

Question 3

Comparing one- and two-tailed tests (with a constant alpha level and sample size), the probability of rejection will be higher for

Accepted Answer

A)  the two-tailed test 
B)  the one-tailed test, if you have correctly predicted the direction of the difference 
C)  neither, the probability of rejection does not change 
D)  the test with the most conservative test statistic 
A)  the two-tailed test 
B)  the one-tailed test, if you have correctly predicted the direction of the difference 
C)  neither, the probability of rejection does not change 
D)  the test with the most conservative test statistic B

Question 4

If the test statistic falls in the critical region, we

Accepted Answer

A)  reject the null hypothesis and conclude that the research hypothesis is true 
B)  reject the null hypothesis and conclude that there is strong - although indirect - support for the research hypothesis 
C)  accept the null hypothesis 
D)  fail to reject the null hypothesis 
A)  reject the null hypothesis and conclude that the research hypothesis is true 
B)  reject the null hypothesis and conclude that there is strong - although indirect - support for the research hypothesis 
C)  accept the null hypothesis 
D)  fail to reject the null hypothesis

Question 5

If we reject a null hypothesis which is in fact true, we

Accepted Answer

A)  have made a correct decision 
B)  have made a Type I error 
C)  have made a Type II error 
D)  should have used a one-tailed test 
A)  have made a correct decision 
B)  have made a Type I error 
C)  have made a Type II error 
D)  should have used a one-tailed test

Question 6

The records of the state Division of Motor Vehicles reveals that 23% of all drivers have been ticketed at least once in the last five years. Twenty five percent of a random sample of older drivers in the state have gotten at least one ticket in the same time period. This difference has been tested and the researcher has failed to reject the null hypothesis. What can be concluded?

Accepted Answer

A)  Older drivers are better drivers 
B)  Older drivers are worse drivers 
C)  There is no significant difference between older drivers and drivers in general in terms of number of tickets. 
D)  Older drivers are significantly different from drivers in general. 
A)  Older drivers are better drivers 
B)  Older drivers are worse drivers 
C)  There is no significant difference between older drivers and drivers in general in terms of number of tickets. 
D)  Older drivers are significantly different from drivers in general.

Question 7

In a one-tailed test of hypothesis, the entire _________ should be placed in either the upper or lower tail of the ____________

Accepted Answer

A)  critical area … sampling distribution 
B)  sample mean … population distribution 
C)  Z score … critical area 
D)  sampling distribution … sample distribution 
A)  critical area … sampling distribution 
B)  sample mean … population distribution 
C)  Z score … critical area 
D)  sampling distribution … sample distribution

Question 8

Which of the following combinations would result in a Type II error? The null hypothesis is actually _______ and our decision in Step 5 is to ________ the null hypothesis.

Accepted Answer

A)  false … fail to reject 
B)  false … reject 
C)  true … fail to reject 
D)  true … reject 
A)  false … fail to reject 
B)  false … reject 
C)  true … fail to reject 
D)  true … reject

Question 9

Given that the null hypothesis is actually true, the probability of Type II error is

Accepted Answer

A)  0.00 
B)  0.05 
C)  1.00 
D)  the alpha level 
A)  0.00 
B)  0.05 
C)  1.00 
D)  the alpha level

Question 10

The probability of Type I error is

Accepted Answer

A)  .01 
B)  .05 
C)  the alpha level 
D)  beta 
A)  .01 
B)  .05 
C)  the alpha level 
D)  beta

Question 11

Which assumption must be true in order to justify the use of hypothesis testing?

Accepted Answer

A)  random sampling 
B)  interval-ratio level of measurement 
C)  very large samples 
D)  samples have been according to a strict application of the parameter 
A)  random sampling 
B)  interval-ratio level of measurement 
C)  very large samples 
D)  samples have been according to a strict application of the parameter

Question 12

When we decide on a value for alpha, we are

Accepted Answer

A)  defining the likelihood of accepting the alternative hypothesis 
B)  establishing whether the test will be one or two tailed 
C)  setting the probability of committing a Type I error 
D)  setting the probability of a one-tailed test 
A)  defining the likelihood of accepting the alternative hypothesis 
B)  establishing whether the test will be one or two tailed 
C)  setting the probability of committing a Type I error 
D)  setting the probability of a one-tailed test

Question 13

Under what condition might we use proportions rather than means as the test statistic?

Accepted Answer

A)  when sample size is very small 
B)  when sample size is very large 
C)  when the variable of interest is only interval-ratio in level of measurement 
D)  when the variable of interest is only nominal in level of measurement 
A)  when sample size is very small 
B)  when sample size is very large 
C)  when the variable of interest is only interval-ratio in level of measurement 
D)  when the variable of interest is only nominal in level of measurement

Question 14

Do sex education classes and free clinics that offer counseling for teenagers reduce the number of pregnancies among teenagers? The appropriate test of hypothesis would be

Accepted Answer

A)  a one-tailed test 
B)  a two-tailed test 
C)  cross-sectional 
D)  participant observation 
A)  a one-tailed test 
B)  a two-tailed test 
C)  cross-sectional 
D)  participant observation

Question 15

An alpha of 0.01 means that a decision to _______ the null hypothesis has a ___ in 100 chance of being incorrect

Accepted Answer

A)  accept, 1 
B)  fail to reject, 1 
C)  reject, 1 
D)  reject, 100 
A)  accept, 1 
B)  fail to reject, 1 
C)  reject, 1 
D)  reject, 100

Question 16

According to the text, the Federal Drug Administration tests new drugs based on the assumption that the

Accepted Answer

A)  sample has not been selected according to EPSEM 
B)  null hypothesis ("the drug is not effective") is true 
C)  level of measurement is less than ordinal 
D)  sample is neither biased nor efficient 
A)  sample has not been selected according to EPSEM 
B)  null hypothesis ("the drug is not effective") is true 
C)  level of measurement is less than ordinal 
D)  sample is neither biased nor efficient

Question 17

Given the same alpha level, the one-tailed test

Accepted Answer

A)  makes it harder to reject the Ho 
B)  does not affect the probability of rejecting the Ho 
C)  makes it more likely that Ho will be rejected 
D)  is less dependable than the two-tailed test 
A)  makes it harder to reject the Ho 
B)  does not affect the probability of rejecting the Ho 
C)  makes it more likely that Ho will be rejected 
D)  is less dependable than the two-tailed test

Question 18

In hypothesis testing, the _____________ is the critical assumption, the assumption which is actually tested.

Accepted Answer

A)  research hypothesis 
B)  null hypothesis 
C)  assumption of a normal sampling distribution 
D)  assumption that the sample was randomly selected 
A)  research hypothesis 
B)  null hypothesis 
C)  assumption of a normal sampling distribution 
D)  assumption that the sample was randomly selected

Question 19

The t distribution, compared to the Z distribution, is

Accepted Answer

A)  more skewed 
B)  more peaked for small samples but increasingly like the Z distribution as N increases 
C)  bimodal 
D)  flatter for small sample sizes but increasingly like the Z distribution as N increases 
A)  more skewed 
B)  more peaked for small samples but increasingly like the Z distribution as N increases 
C)  bimodal 
D)  flatter for small sample sizes but increasingly like the Z distribution as N increases

Question 20

Which of the following are we unlikely to know when conducting a test of hypothesis in the one sample case?

Accepted Answer

A)  the sample standard deviation 
B)  the mean of the sample 
C)  the standard deviation of the population 
D)  the alpha level 
A)  the sample standard deviation 
B)  the mean of the sample 
C)  the standard deviation of the population 
D)  the alpha level

In order to reject the null hypothesis when using the t distribution and small samples, we will

The central problem in the case of one sample hypothesis test is to determine

Comparing one- and two-tailed tests (with a constant alpha level and sample size), the probability of rejection will be higher for

If the test statistic falls in the critical region, we

If we reject a null hypothesis which is in fact true, we

In a one-tailed test of hypothesis, the entire _ should be placed in either the upper or lower tail of the ____

Which of the following combinations would result in a Type II error? The null hypothesis is actually _ and our decision in Step 5 is to __ the null hypothesis.

Given that the null hypothesis is actually true, the probability of Type II error is

The probability of Type I error is

Which assumption must be true in order to justify the use of hypothesis testing?

When we decide on a value for alpha, we are

Under what condition might we use proportions rather than means as the test statistic?

Do sex education classes and free clinics that offer counseling for teenagers reduce the number of pregnancies among teenagers? The appropriate test of hypothesis would be

An alpha of 0.01 means that a decision to _____ the null hypothesis has a _ in 100 chance of being incorrect

According to the text, the Federal Drug Administration tests new drugs based on the assumption that the

Given the same alpha level, the one-tailed test

In hypothesis testing, the _____________ is the critical assumption, the assumption which is actually tested.

The t distribution, compared to the Z distribution, is

Which of the following are we unlikely to know when conducting a test of hypothesis in the one sample case?

Introduction

Basic Descriptive Statistics Percentages, Ratios Rates, Tables, Charts Graphs

Measures of Central Tendency

Measures of Dispersion

The Normal Curve

Introduction to Inferential Statistics Sampling the Sampling Distribution

Hypothesis Testing II the Two-Sample Case

Hypothesis Testing III: the Analysis of Variance

Hypothesis Testing Iv Chi Square

Bivariate Association for Nominal- and Ordinal-Level Variables

Association Between Variables Measured at the Interval-Ratio Level

Partial Correlation and

Filters

Exam 7: Hypothesis Testing I the One-Sample Case

In order to reject the null hypothesis when using the t distribution and small samples, we will

The central problem in the case of one sample hypothesis test is to determine

Comparing one- and two-tailed tests (with a constant alpha level and sample size), the probability of rejection will be higher for

If the test statistic falls in the critical region, we

If we reject a null hypothesis which is in fact true, we

In a one-tailed test of hypothesis, the entire _________ should be placed in either the upper or lower tail of the ____________

Which of the following combinations would result in a Type II error? The null hypothesis is actually _______ and our decision in Step 5 is to ________ the null hypothesis.

Given that the null hypothesis is actually true, the probability of Type II error is

The probability of Type I error is

Which assumption must be true in order to justify the use of hypothesis testing?

When we decide on a value for alpha, we are

Under what condition might we use proportions rather than means as the test statistic?

Do sex education classes and free clinics that offer counseling for teenagers reduce the number of pregnancies among teenagers? The appropriate test of hypothesis would be

An alpha of 0.01 means that a decision to _______ the null hypothesis has a ___ in 100 chance of being incorrect

According to the text, the Federal Drug Administration tests new drugs based on the assumption that the

Given the same alpha level, the one-tailed test

In hypothesis testing, the _____________ is the critical assumption, the assumption which is actually tested.

The t distribution, compared to the Z distribution, is

Which of the following are we unlikely to know when conducting a test of hypothesis in the one sample case?

Introduction

Basic Descriptive Statistics Percentages, Ratios Rates, Tables, Charts Graphs

Measures of Central Tendency

Measures of Dispersion

The Normal Curve

Introduction to Inferential Statistics Sampling the Sampling Distribution

Hypothesis Testing II the Two-Sample Case

Hypothesis Testing III: the Analysis of Variance

Hypothesis Testing Iv Chi Square

Bivariate Association for Nominal- and Ordinal-Level Variables

Association Between Variables Measured at the Interval-Ratio Level

Partial Correlation and

Filters

In a one-tailed test of hypothesis, the entire _ should be placed in either the upper or lower tail of the ____

Which of the following combinations would result in a Type II error? The null hypothesis is actually _ and our decision in Step 5 is to __ the null hypothesis.

An alpha of 0.01 means that a decision to _____ the null hypothesis has a _ in 100 chance of being incorrect