Question 1

When testing for the significance of the difference between a sample mean and a population mean,degrees of freedom are equal to

Accepted Answer

A) N - 1. 
B) N + 1. 
C) alpha. 
D) 1 - alpha. 
A) N - 1. 
B) N + 1. 
C) alpha. 
D) 1 - alpha.

Question 2

With alpha set at .05,the Critical Region for a two-tailed test would begin at$\pm$ 1.96.In a one-tailed test at the same alpha level,the Critical Region would begin at

Accepted Answer

A) $\pm$1.96. 
B) $\pm$2.58. 
C) $\pm$2.30. 
D) $\pm$1.65. 
A) $\pm$1.96. 
B) $\pm$2.58. 
C) $\pm$2.30. 
D) $\pm$1.65.

Question 3

In your own words,define and explain each of the following terms and concepts:
A)the null hypothesis
B)Type I (alpha) error
C)Sampling distribution
D)One-tailed test

Accepted Answer

The answer of In your own words,define and explain each...

Question 4

Which of the following combinations would result in a Type I 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 5

If we reject a null hypothesis of "no difference" at the 0.05 level,

Accepted Answer

A) the odds are 20 to 1 in our favor that we have made a correct decision. 
B) the null hypothesis is true. 
C) the odds are 5 to 1 in our favor that we have made a correct decision. 
D) the research hypothesis is true. 
A) the odds are 20 to 1 in our favor that we have made a correct decision. 
B) the null hypothesis is true. 
C) the odds are 5 to 1 in our favor that we have made a correct decision. 
D) the research hypothesis is true.

Question 6

A researcher is interested in the effect that neighborhood crime-watch efforts have on the crime rate in the inner city,but he is unwilling to predict the direction of the difference.The appropriate test of hypothesis would be

Accepted Answer

A) one-tailed. 
B) two-tailed. 
C) descriptive. 
D) symmetrical. 
A) one-tailed. 
B) two-tailed. 
C) descriptive. 
D) symmetrical.

Question 7

In tests of significance,if the test statistic does NOT fall in the critical region,we

Accepted Answer

A) conclude that the population distribution is normal. 
B) reject the null hypothesis. 
C) fail to reject the research hypothesis. 
D) conclude that our alpha level was too low. 
A) conclude that the population distribution is normal. 
B) reject the null hypothesis. 
C) fail to reject the research hypothesis. 
D) conclude that our alpha level was too low.

Question 8

Which of the following is NOT an assumption required for a test of hypothesis with a single sample mean?

Accepted Answer

A) a representative sample 
B) sample size (N)larger than 1,000 
C) normal sampling distribution 
D) interval-ratio level of measurement 
A) a representative sample 
B) sample size (N)larger than 1,000 
C) normal sampling distribution 
D) interval-ratio level of measurement

Question 9

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 stratified 
A) random sampling 
B) interval-ratio level of measurement 
C) very large samples 
D) samples have been stratified

Question 10

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 11

A researcher selected a sample of 268 former student athletes from a list of graduates of a large university.A total of 17% of the sample of athletes had earned graduate degrees as compared 14% of all graduates.Is the difference statistically significant? Follow the five step model and state all important decisions.Make sure that you interpret the results in terms of the original research question.

Accepted Answer

The answer of A researcher selected a sample of 268...

Question 12

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 13

The research and null hypotheses ____ each other.

Accepted Answer

A) contradict 
B) complement 
C) amplify 
D) rescind 
A) contradict 
B) complement 
C) amplify 
D) rescind

Question 14

In order to conduct a test of hypothesis with means or proportions,the sampling distribution must be

Accepted Answer

A) skewed. 
B) large. 
C) bimodal. 
D) normal. 
A) skewed. 
B) large. 
C) bimodal. 
D) normal.

Question 15

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.

When testing for the significance of the difference between a sample mean and a population mean,degrees of freedom are equal to

With alpha set at .05,the Critical Region for a two-tailed test would begin at $\pm$ 1.96.In a one-tailed test at the same alpha level,the Critical Region would begin at

In your own words,define and explain each of the following terms and concepts: A)the null hypothesis B)Type I (alpha) error C)Sampling distribution D)One-tailed test

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

If we reject a null hypothesis of "no difference" at the 0.05 level,

A researcher is interested in the effect that neighborhood crime-watch efforts have on the crime rate in the inner city,but he is unwilling to predict the direction of the difference.The appropriate test of hypothesis would be

In tests of significance,if the test statistic does NOT fall in the critical region,we

Which of the following is NOT an assumption required for a test of hypothesis with a single sample mean?

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

When we decide on a value for alpha,we are

The probability of Type I error is

The research and null hypotheses ____ each other.

In order to conduct a test of hypothesis with means or proportions,the sampling distribution must be

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

Introduction

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

Measures of Central Tendency

Measures of Dispersion

The Normal Curve

Introduction to Inferential Statistics: Sampling and the Sampling Distribution

Estimation Procedures

Hypothesis Testing II: the Two-Sample Case

Hypothesis Testing III: the Analysis of Variance

Hypothesis Testing Iv: Chi Square

Bivariate Association: Introduction and Basic Concepts

Association Between Variables Measured at the Nominal Level

Association Between Variables Measured at the Ordinal Level

Association Between Variables Measured at the Interval-Ratio Level

Elaborating Bivariate Tables

Partial Correlation and Multiple Regression and Correlation

Filters

Exam 8: Hypothesis Testing I: the One-Sample Case

When testing for the significance of the difference between a sample mean and a population mean,degrees of freedom are equal to

With alpha set at .05,the Critical Region for a two-tailed test would begin at ±\pm± 1.96.In a one-tailed test at the same alpha level,the Critical Region would begin at

In your own words,define and explain each of the following terms and concepts: A)the null hypothesis B)Type I (alpha) error C)Sampling distribution D)One-tailed test

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

If we reject a null hypothesis of "no difference" at the 0.05 level,

A researcher is interested in the effect that neighborhood crime-watch efforts have on the crime rate in the inner city,but he is unwilling to predict the direction of the difference.The appropriate test of hypothesis would be

In tests of significance,if the test statistic does NOT fall in the critical region,we

Which of the following is NOT an assumption required for a test of hypothesis with a single sample mean?

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

When we decide on a value for alpha,we are

The probability of Type I error is

The research and null hypotheses ____ each other.

In order to conduct a test of hypothesis with means or proportions,the sampling distribution must be

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

Introduction

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

Measures of Central Tendency

Measures of Dispersion

The Normal Curve

Introduction to Inferential Statistics: Sampling and the Sampling Distribution

Estimation Procedures

Hypothesis Testing II: the Two-Sample Case

Hypothesis Testing III: the Analysis of Variance

Hypothesis Testing Iv: Chi Square

Bivariate Association: Introduction and Basic Concepts

Association Between Variables Measured at the Nominal Level

Association Between Variables Measured at the Ordinal Level

Association Between Variables Measured at the Interval-Ratio Level

Elaborating Bivariate Tables

Partial Correlation and Multiple Regression and Correlation

Filters

With alpha set at .05,the Critical Region for a two-tailed test would begin at $\pm$ 1.96.In a one-tailed test at the same alpha level,the Critical Region would begin at

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