Grade Booster 3: Chi Square Test

Find the degrees of freedom.

• 4
• 5
• 6
• 7

The table shows the number or babies born on each day of the week.  Is there evidence that births are more likely on specific days of the week?

• yes, the p value is greater than .05
• no, the p value is less than .05
• yes, the p value is less than .05
• no, the p value is greater than .05

What must be true about the expected values in a chi square test?

• greater than or equal to 2
• greater than or equal to 5
• greater than or equal to 10
• greater than or equal to 30

Which test would you use .... In 1974, each acre of the Tahoe basin was assessed to see what condition the soil was in.  23% of acres were of type I, 32% were of type II, 41% were of type III, and 16% were of type IV.  This year the region was assessed again and the number of each type were again determined.

• Chi-square Goodness of Fit Test
• Chi-Square Test for Homogeneity
• Chi-Square Test for Independence/Association
• Not a Chi-square test

What are the expected counts of a female who likes Pepsi?

• 10.5
• 11
• 14.5
• 6.3

Tags

CCSS.HSS.MD.A.2

Which significance level  
(column) do you look at when finding the critical value?

• .50
• .10
• .05
• .01

How do you find critical value?

• where degrees of freedom lines up with significance level
• where significance level lines up with chi-square
• the difference between total and chi-square 
• degrees of freedom minus significance level

Tags

CCSS.HSS.ID.A.4

What is the expected value of a female who likes Pepsi?

• 10.5

• 11

• 14.5

• 6.3

Tags

CCSS.HSS.MD.B.5B

What is the

χ² _calculated value for the following situation.

• 6.65

• 6.66

• 0.00991

• 1

If the χ² _critical value = 5.99 and the

χ² _calculated value = 7.35, what is the conclusion

• Reject Ho, accept H1

• Accept Ho, reject H1

• there is not enough info to decide

• The conclusion can only be made if we also know the p-value