Chi-Square Test for Independence Practice

Which is a possible null hypothesis using chi square test of independence? " Kat wants to find out if there is a relationship between number of siblings and grade in Math."

• There is a relationship between number of siblings and grade in Math.

• Number of siblings is independent of grade in Math.

• There is no relationship between number of siblings and grade in Math.

• Number of siblings is not independent of grade in Math.

What is the null hypothesis?

• Injury type is independent of position played

• Injury type is not independent on the position played independent

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

• 10.5
• 11
• 14.5
• 6.3

Tags

CCSS.HSS.MD.A.2

CCSS.HSS.CP.A.4

CCSS.HSS.ID.B.5

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

Tags

CCSS.HSS.MD.A.2

CCSS.HSS.MD.A.3

What is the expected value of The experimental group applied with drugs and a loss in the chess game?

• 14.3

• 10.3

• .07

• 6.43

Tags

CCSS.HSS.MD.A.2

What are the degrees of freedom for the following χ² test?

• 6

• 2

• 5

• 36

In a chi square test for independence, the table of observed frequencies has 4 rows and 3 columns excluding the total. What is the degrees of freedom for the test?

• 3

• 4

• 5

• 6

Which is a not possible level of significance for a chi square test for independence

• 5%

• 1%

• 10%

• 90%

Tags

CCSS.8.SP.A.4

Find the chi-squared calculated value for the table.

• 0.486170447

• 1.442392006

• 1.45

• 2

If the χ² _critical value = 5.99 and the

χ² _calculated value = 4.35, what is the conclusion

• Reject H_o

• Fail to reject H_o (Accept H_o)

• there is not enough info to decide

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