Question 1

For tests of significance involving two sample proportions,the value of the population proportion is estimated from

Accepted Answer

A) the value of the sample means. 
B) the value of Z (obtained). 
C) the sample proportions. 
D) the sample standard deviations. 
A) the value of the sample means. 
B) the value of Z (obtained). 
C) the sample proportions. 
D) the sample standard deviations.

Question 2

When testing for the significance of the difference between two sample means,the null hypothesis can be stated as

Accepted Answer

A)  $\bar { X } _ { 1 }$ = $\bar { X } _ { 2 }$ 
B) m > 0 
C) m = m 
D) s = s 
A)  $\bar { X } _ { 1 }$ = $\bar { X } _ { 2 }$ 
B) m > 0 
C) m = m 
D) s = s

Question 3

A researcher conducted a survey to determine if older people have different feelings about abortion than younger people.He used an alpha level of 0.05 (Z critical = $\pm$1.96)to test for significance and found that his computed test statistic was 2.76.He may conclude that

Accepted Answer

A) the difference occurred by random chance 
B) the difference did not occur by random chance 
C) the samples are not independent 
D) the alpha level was too low 
A) the difference occurred by random chance 
B) the difference did not occur by random chance 
C) the samples are not independent 
D) the alpha level was too low

Question 4

The value of all test statistics increases as ____ increases

Accepted Answer

A) the sampling distribution 
B) the alpha level 
C) the size of the critical region 
D) sample size 
A) the sampling distribution 
B) the alpha level 
C) the size of the critical region 
D) sample size

Question 5

Rejection of the null hypothesis in the two-sample case implies that the

Accepted Answer

A) samples are different on the trait of interest. 
B) populations from which the samples are drawn are different on the trait of interest. 
C) samples are not different on the trait of interest. 
D) populations from which the samples are drawn are not different on the trait of interest. 
A) samples are different on the trait of interest. 
B) populations from which the samples are drawn are different on the trait of interest. 
C) samples are not different on the trait of interest. 
D) populations from which the samples are drawn are not different on the trait of interest.

Question 6

The higher the alpha level,

Accepted Answer

A) the lower the probability of rejecting the null hypothesis. 
B) the larger the sample size has to be to reject the null hypothesis. 
C) the greater the probability of rejecting the null hypothesis. 
D) the more desirable the two-tailed test. 
A) the lower the probability of rejecting the null hypothesis. 
B) the larger the sample size has to be to reject the null hypothesis. 
C) the greater the probability of rejecting the null hypothesis. 
D) the more desirable the two-tailed test.

Question 7

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

Accepted Answer

A) if the samples are random. 
B) if sample statistics are the same as those of the sampling distribution. 
C) if the parameters are representative of the populations. 
D) if two populations differ significantly on the trait in question. 
A) if the samples are random. 
B) if sample statistics are the same as those of the sampling distribution. 
C) if the parameters are representative of the populations. 
D) if two populations differ significantly on the trait in question.

For tests of significance involving two sample proportions,the value of the population proportion is estimated from

When testing for the significance of the difference between two sample means,the null hypothesis can be stated as

A researcher conducted a survey to determine if older people have different feelings about abortion than younger people.He used an alpha level of 0.05 (Z critical = $\pm$ 1.96)to test for significance and found that his computed test statistic was 2.76.He may conclude that

The value of all test statistics increases as ____ increases

Rejection of the null hypothesis in the two-sample case implies that the

The higher the alpha level,

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

Introduction

Basic Descriptive Statistics: Percentages Ratios and Rates Frequency Distributions

Charts and Graphs

Measures of Central Tendency

Measures of Dispersion

The Normal Curve

Introduction in Inferential Statistics, the Sampling Distribution, and Estimation

Hypothesis Testing I: the One-Sample Case

Hypothesis Testing III: the Analysis of Variance

Hypothesis Testing Iv: Chi Square

Introduction to Bivariate Association and Measures of Association for Variables Measured at the Nominal Level

Association Between Variables Measured at the Ordinal Level

Association Between Variables Measured at the Interval-Ratio Level

Partial Correlation and Multiple Regression and Correlation

Filters

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

For tests of significance involving two sample proportions,the value of the population proportion is estimated from

When testing for the significance of the difference between two sample means,the null hypothesis can be stated as

A researcher conducted a survey to determine if older people have different feelings about abortion than younger people.He used an alpha level of 0.05 (Z critical = ±\pm± 1.96)to test for significance and found that his computed test statistic was 2.76.He may conclude that

The value of all test statistics increases as ____ increases

Rejection of the null hypothesis in the two-sample case implies that the

The higher the alpha level,

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

Introduction

Basic Descriptive Statistics: Percentages Ratios and Rates Frequency Distributions

Charts and Graphs

Measures of Central Tendency

Measures of Dispersion

The Normal Curve

Introduction in Inferential Statistics, the Sampling Distribution, and Estimation

Hypothesis Testing I: the One-Sample Case

Hypothesis Testing III: the Analysis of Variance

Hypothesis Testing Iv: Chi Square

Introduction to Bivariate Association and Measures of Association for Variables Measured at the Nominal Level

Association Between Variables Measured at the Ordinal Level

Association Between Variables Measured at the Interval-Ratio Level

Partial Correlation and Multiple Regression and Correlation

Filters

A researcher conducted a survey to determine if older people have different feelings about abortion than younger people.He used an alpha level of 0.05 (Z critical = $\pm$ 1.96)to test for significance and found that his computed test statistic was 2.76.He may conclude that