Question 1

In the Chi square test,expected frequencies are computed by

Accepted Answer

A) adding the observed frequency to N and subtracting the number of cells. 
B) multiplying the observed frequencies by the row marginals and dividing by degrees of freedom. 
C) multiplying the proper row and column marginals for each cell and dividing by N. 
D) adding the proper row and column marginals together and dividing by N. 
A) adding the observed frequency to N and subtracting the number of cells. 
B) multiplying the observed frequencies by the row marginals and dividing by degrees of freedom. 
C) multiplying the proper row and column marginals for each cell and dividing by N. 
D) adding the proper row and column marginals together and dividing by N.

Question 2

In a research study conducted to determine if arrests were related to the socioeconomic class of the offender,the chi square critical score was 9.488 and the chi square test statistic was 12.2.We can conclude that

Accepted Answer

A) the variables are independent. 
B) being in a certain socioeconomic class causes arrests. 
C) the variables are dependent. 
D) the probability of getting these results by random chance alone is 0.5. 
A) the variables are independent. 
B) being in a certain socioeconomic class causes arrests. 
C) the variables are dependent. 
D) the probability of getting these results by random chance alone is 0.5.

Question 3

A researcher reports that her obtained chi square of -17.56 is significant because it exceeds the critical Chi square of -3.841 for an alpha of .05 with 2 degrees of freedom.What mistake has been made?

Accepted Answer

A) neither critical nor obtained Chi squares can have negative values 
B) it is impossible to have only 2 degrees of freedom 
C) it is impossible for obtained Chi square to exceed 10 
D) a one-tailed test should have been used 
A) neither critical nor obtained Chi squares can have negative values 
B) it is impossible to have only 2 degrees of freedom 
C) it is impossible for obtained Chi square to exceed 10 
D) a one-tailed test should have been used

Question 4

If Chi square obtained has a negative value

Accepted Answer

A) an arithmetic error has been made. 
B) a one-tailed test is called for. 
C) the row and column variables must be switched. 
D) the null hypothesis must be rejecteD. 
A) an arithmetic error has been made. 
B) a one-tailed test is called for. 
C) the row and column variables must be switched. 
D) the null hypothesis must be rejecteD.

In the Chi square test,expected frequencies are computed by

In a research study conducted to determine if arrests were related to the socioeconomic class of the offender,the chi square critical score was 9.488 and the chi square test statistic was 12.2.We can conclude that

A researcher reports that her obtained chi square of -17.56 is significant because it exceeds the critical Chi square of -3.841 for an alpha of .05 with 2 degrees of freedom.What mistake has been made?

If Chi square obtained has a negative value

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 II: the Two-Sample Case

Hypothesis Testing III: the Analysis of Variance

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 11: Hypothesis Testing Iv: Chi Square

In the Chi square test,expected frequencies are computed by

In a research study conducted to determine if arrests were related to the socioeconomic class of the offender,the chi square critical score was 9.488 and the chi square test statistic was 12.2.We can conclude that

A researcher reports that her obtained chi square of -17.56 is significant because it exceeds the critical Chi square of -3.841 for an alpha of .05 with 2 degrees of freedom.What mistake has been made?

If Chi square obtained has a negative value

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 II: the Two-Sample Case

Hypothesis Testing III: the Analysis of Variance

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