When conducting hypothesis tests for two sample means,the term m1 - m2 in the numerator of the formula reduces to zero because

A) the standard deviations are calculated first. B) the tests are conducted at very low alpha levels. C) the samples are independent as well as random. D) the null hypothesis is assumed to be true. A) the standard deviations are calculated first. B) the tests are conducted at very low alpha levels. C) the samples are independent as well as random. D) the null hypothesis is assumed to be true.

Exam 9: Hypothesis Testing II: the Two-Sample Case

The text reports the results of a test for the significance of the difference in average education for random samples of males and females.Males earned an average of 13.35 years of schooling and females averaged 13.25 years.The Z score computed in step 4 for this difference was 1.02.Given these results,which of the following is a reasonable conclusion?

(Multiple Choice)

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Question 41

To maximize the probability of rejecting the null hypothesis,use

(Multiple Choice)

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Question 42

Random samples of 1546 men and 1678 women have been given a scale that measures support of legal abortion.Men average 12.45 and women average 12.46 and the difference is significant at the 0.05 level.What can we conclude?

(Multiple Choice)

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Question 43

A sample of students attending a large university has been selected.Is there a statistically significant difference between Liberal Arts majors and other students on average number of books (other than those required by course work)read per year? Use the five step model and write a sentence or two interpreting your results. Liberal Arts Other =16.2 =13.7 =2.3 =9.0 =236 =321

(Short Answer)

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Question 44

When conducting hypothesis tests for two sample means,the term m₁ - m₂ in the numerator of the formula reduces to zero because

(Multiple Choice)

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Question 45

What causes the gender gap in income documented in the text? One possible reason is that

(Multiple Choice)

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Question 46

When testing for the significance of the difference between two samples,which is the proper assumption for step 1?

(Multiple Choice)

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Question 47

When is the t distribution used instead of the Z distribution to test the significance of the difference between two sample means?

(Multiple Choice)

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Question 48

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

(Multiple Choice)

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Question 49

Samples of Republicans and Democrats have been tested for their level of support for a new immigration policy.The test statistic is 0.54 and the critical region begins at $\pm$ 1.96.What may we conclude?

(Multiple Choice)

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Question 50

When solving the formula for finding Z(obtained)with sample proportions in the two-sample case,we must first estimate

(Multiple Choice)

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Question 51

From a university population,random samples of 45 seniors and 37 freshman have been given a scale that measures sexual experiences.The freshman report an average of 1.6 sexual partners over their lifetimes while seniors report an average of 2.5 partners.The t (obtained)for this difference was -3.56 while the t (critical)was $\pm$ 2.34.What can be concluded?

(Multiple Choice)

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Question 52

Is there a statistically significant difference between males and females in terms of newspaper readership? The proportion of each sex that says they read a newspaper daily is reported below.Results are from a nationally representative sample.Use the five step model and write a sentence or two interpreting your results. Males Females =.56 =.59 =786 =965

(Short Answer)

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Question 53

Showing 41 - 53 of 53

To maximize the probability of rejecting the null hypothesis,use

Random samples of 1546 men and 1678 women have been given a scale that measures support of legal abortion.Men average 12.45 and women average 12.46 and the difference is significant at the 0.05 level.What can we conclude?

When conducting hypothesis tests for two sample means,the term m₁ - m₂ in the numerator of the formula reduces to zero because

What causes the gender gap in income documented in the text? One possible reason is that

When testing for the significance of the difference between two samples,which is the proper assumption for step 1?

When is the t distribution used instead of the Z distribution to test the significance of the difference between two sample means?

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

Samples of Republicans and Democrats have been tested for their level of support for a new immigration policy.The test statistic is 0.54 and the critical region begins at $\pm$ 1.96.What may we conclude?

When solving the formula for finding Z(obtained)with sample proportions in the two-sample case,we must first estimate

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 I: the One-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 9: Hypothesis Testing II: the Two-Sample Case

To maximize the probability of rejecting the null hypothesis,use

Random samples of 1546 men and 1678 women have been given a scale that measures support of legal abortion.Men average 12.45 and women average 12.46 and the difference is significant at the 0.05 level.What can we conclude?

When conducting hypothesis tests for two sample means,the term m1 - m2 in the numerator of the formula reduces to zero because

What causes the gender gap in income documented in the text? One possible reason is that

When testing for the significance of the difference between two samples,which is the proper assumption for step 1?

When is the t distribution used instead of the Z distribution to test the significance of the difference between two sample means?

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

Samples of Republicans and Democrats have been tested for their level of support for a new immigration policy.The test statistic is 0.54 and the critical region begins at ±\pm± 1.96.What may we conclude?

When solving the formula for finding Z(obtained)with sample proportions in the two-sample case,we must first estimate

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 I: the One-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

When conducting hypothesis tests for two sample means,the term m₁ - m₂ in the numerator of the formula reduces to zero because

Samples of Republicans and Democrats have been tested for their level of support for a new immigration policy.The test statistic is 0.54 and the critical region begins at $\pm$ 1.96.What may we conclude?