Question 1

χ2 tests are always non-directional.

Accepted Answer

A) True 
 B)False

Question 2

In a test of independence, when F1F1F1S1F1F1F10 = .05, k1 = 6 and k2 = 3, the critical χ2 is ______.

Accepted Answer

A)  28.869 
B)  12.592 
C)  18.307 
D)  7.815 
A)  28.869 
B)  12.592 
C)  18.307 
D)  7.815

Question 3

Which of these is a research question describing a goodness of fit test?

Accepted Answer

A)  Is this preference for our product likely given a population mean of 8? 
B)  Are there differences in preferences for our product between groups? 
C)  Between our three products, is one chosen more often by men? 
D)  When sampling each of our products, which is most often chosen as best? 
A)  Is this preference for our product likely given a population mean of 8? 
B)  Are there differences in preferences for our product between groups? 
C)  Between our three products, is one chosen more often by men? 
D)  When sampling each of our products, which is most often chosen as best?

Question 4

Non-parametric tests examine the ______ of a(n) ______ .

Accepted Answer

A)  goodness, independence 
B)  independence, goodness 
C)  fit, model 
D)  model, fit 
A)  goodness, independence 
B)  independence, goodness 
C)  fit, model 
D)  model, fit

Question 5

The following is a valid alternative hypothesis: : Gum preference is not independent of gender.

Accepted Answer

A) True 
 B)False

Question 6

How do you determine the expected model for a goodness-of-fit test? Provide an example.

Accepted Answer

The model for a goodness-of-fit test is

Question 7

In a goodness of fit test, when F1F1F1S1F1F1F10 = .01 and n = 20, the critical χ2 is ______.

Accepted Answer

A)  52.191 
B)  50.892 
C)  31.410 
D)  none of these 
A)  52.191 
B)  50.892 
C)  31.410 
D)  none of these

Question 8

Which of the following is considered a "strong" Cramer's V?

Accepted Answer

A)  .2 
B)  .8 
C)  -.8 
D)  none of these 
A)  .2 
B)  .8 
C)  -.8 
D)  none of these

Question 9

When conducting a χ2 test of independence when k1 = 3 and k2 = 4, the critical value is 21.026.

Accepted Answer

A) True 
 B)False

Question 10

You run a small business with four employees: Susan, Jimmy, Albert, and Camilla. Because you need three employees at work at any given time, only one employee ever has the day off. Unfortunately, everyone always wants Saturday off. One of your employees has confronted you and said that you favour some employees over others in providing Saturdays off. To investigate this, you pulled up a list of who has recently had Saturdays off each week. Over the past 24 weeks, Jimmy has had 10 Saturdays off, Susan has had 2 Saturdays off, Albert has had 12 Saturdays off, and Camilla has had 16 Saturdays off.
1) What is the research question?
2) What are the hypotheses?
3) What are the degrees of freedom?
4) What is the critical value for this test?
5) State the formal results of the test.
6) Should you compute a measure of the overall effect size? How do you know? If so, calculate this effect size.
7) State all appropriate conclusions.

Accepted Answer

1) RQ: Do you favour some employees when

Question 11

Parametric tests work by assuming ______.

Accepted Answer

A)  that a meaningful statistic can be set and then testing a parameter again that statistic 
B)  that a meaningful parameter can be set and then testing a sample against that parameter 
C)  that a parameter can be used to reasonably summarize data and then measuring that parameter 
D)  none of these 
A)  that a meaningful statistic can be set and then testing a parameter again that statistic 
B)  that a meaningful parameter can be set and then testing a sample against that parameter 
C)  that a parameter can be used to reasonably summarize data and then measuring that parameter 
D)  none of these

Question 12

A Cramer's V calculated on a 2 × 2 contingency table is also called a ______.

Accepted Answer

A)  Cohen's d 
B)  phi coefficient 
C)  eta-squared 
D)  none of these 
A)  Cohen's d 
B)  phi coefficient 
C)  eta-squared 
D)  none of these

Question 13

Which of these is a valid null hypothesis for a χ2 goodness of fit test?

Accepted Answer

A)  Product preferences are independent of gender. 
B)  Product preferences are not independence of gender. 
C)  There is no difference between observed and expected frequencies of product preference. 
D)  There is a difference between observed and expected frequencies of product preference. 
A)  Product preferences are independent of gender. 
B)  Product preferences are not independence of gender. 
C)  There is no difference between observed and expected frequencies of product preference. 
D)  There is a difference between observed and expected frequencies of product preference.

Question 14

Cramer's V can be interpreted as the difference between cells in standard deviation units.

Accepted Answer

A) True 
 B)False

Question 15

A ______ table is used to illustrate the counts at each intersection of two variables in a test of independence.

Accepted Answer

A)  contingency 
B)  cross 
C)  computational 
D)  none of these 
A)  contingency 
B)  cross 
C)  computational 
D)  none of these

Question 16

In a test of independence, when F1F1F1S1F1F1F10 = .01 and k1 = 5, the critical χ2 is ______.

Accepted Answer

A)  21.666 
B)  24.725 
C)  9.488 
D)  none of these 
A)  21.666 
B)  24.725 
C)  9.488 
D)  none of these

χ² tests are always non-directional.

In a test of independence, when  = .05, k₁ = 6 and k₂ = 3, the critical χ² is ______.

Which of these is a research question describing a goodness of fit test?

Non-parametric tests examine the of a(n) .

The following is a valid alternative hypothesis: : Gum preference is not independent of gender.

How do you determine the expected model for a goodness-of-fit test? Provide an example.

In a goodness of fit test, when  = .01 and n = 20, the critical χ² is ______.

Which of the following is considered a "strong" Cramer's V?

When conducting a χ² test of independence when k₁ = 3 and k₂ = 4, the critical value is 21.026.

Parametric tests work by assuming ______.

A Cramer's V calculated on a 2 × 2 contingency table is also called a ______.

Which of these is a valid null hypothesis for a χ² goodness of fit test?

Cramer's V can be interpreted as the difference between cells in standard deviation units.

A ______ table is used to illustrate the counts at each intersection of two variables in a test of independence.

In a test of independence, when  = .01 and k₁ = 5, the critical χ² is ______.

The Language of Statistics

Working With Numbers and Data Display

Central Tendency and Variability

Probability Distributions

Sampling Distributions

Estimation and Confidence Intervals

Hypothesis Testing

Tests for Significance: Z-Tests and One-Sample T-Tests

Tests for Significance: Paired and Independent-Samples T-Test

Analysis of Variance Anova

Correlation R and Regression Y BX A

Matching Statistical Tests to Business Problems

Filters

Exam 11: CHI-Squared Tests of Fit

χ2 tests are always non-directional.

In a test of independence, when  = .05, k1 = 6 and k2 = 3, the critical χ2 is ______.

Which of these is a research question describing a goodness of fit test?

Non-parametric tests examine the ______ of a(n) ______ .

The following is a valid alternative hypothesis: : Gum preference is not independent of gender.

How do you determine the expected model for a goodness-of-fit test? Provide an example.

In a goodness of fit test, when  = .01 and n = 20, the critical χ2 is ______.

Which of the following is considered a "strong" Cramer's V?

When conducting a χ2 test of independence when k1 = 3 and k2 = 4, the critical value is 21.026.

Parametric tests work by assuming ______.

A Cramer's V calculated on a 2 × 2 contingency table is also called a ______.

Which of these is a valid null hypothesis for a χ2 goodness of fit test?

Cramer's V can be interpreted as the difference between cells in standard deviation units.

A ______ table is used to illustrate the counts at each intersection of two variables in a test of independence.

In a test of independence, when  = .01 and k1 = 5, the critical χ2 is ______.

The Language of Statistics

Working With Numbers and Data Display

Central Tendency and Variability

Probability Distributions

Sampling Distributions

Estimation and Confidence Intervals

Hypothesis Testing

Tests for Significance: Z-Tests and One-Sample T-Tests

Tests for Significance: Paired and Independent-Samples T-Test

Analysis of Variance Anova

Correlation R and Regression Y BX A

Matching Statistical Tests to Business Problems

Filters

χ² tests are always non-directional.

In a test of independence, when  = .05, k₁ = 6 and k₂ = 3, the critical χ² is ______.

Non-parametric tests examine the of a(n) .

In a goodness of fit test, when  = .01 and n = 20, the critical χ² is ______.

When conducting a χ² test of independence when k₁ = 3 and k₂ = 4, the critical value is 21.026.

Which of these is a valid null hypothesis for a χ² goodness of fit test?

In a test of independence, when  = .01 and k₁ = 5, the critical χ² is ______.