Chi Squared

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

• 10.5

• 11

• 14.5

• 6.3

Tags

CCSS.HSS.MD.A.2

CCSS.HSS.MD.A.3

CCSS.HSS.MD.B.5

What is the null hypothesis?

• Injury type is independent of position played

• Injury type is dependent on the position played independent

• Injury type is correlated to position played.

Tags

CCSS.HSS.CP.A.4

CCSS.HSS.ID.B.5

CCSS.HSS.CP.A.2

CCSS.HSS.CP.A.3

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

• 6

• 2

• 5

• 12

Tags

CCSS.HSS.CP.A.4

CCSS.HSS.ID.B.5

If we are testing at a 5% significance level and our p-value is 0.00453, what is the conclusion?

• Accept Ho

• Reject Ho

• We need to know chi-squared

• You cannot do this problem without a calculator

Find the chi-squared calculated value for the table.

• 0.486170447

• 1.442392006

• 1.45

• 2

Tags

CCSS.HSS.CP.A.4

CCSS.HSS.ID.B.5

Chi-squared tests are invalid if:

• The calculated number is really large

• One of the expected values is less than 5

• One of the observed values is less than 5

• The calculated numbers is really small

What is the expected value for all cells, if we assume that this is a fair six sided die?

• 96
• 16
• 8
• 1/6

Tags

CCSS.HSS.MD.A.2

CCSS.HSS.MD.A.3

CCSS.HSS.MD.B.5