Chi Squared

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

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

• 10.5
• 11
• 14.5
• 6.3

The chi-square statistic compares observed values to values that would be expected if H₀ were true. 

• True
• False

What is the Null Hypothesis

• The choice of coke is independent of gender
• The choice of coke is not independent of gender

What are the expected counts of a male who likes Coke?

• 14.5
• 11
• 14.5
• 6.3

What is the
χ² _calculated value for the following situation.

• 6.65
• 6.66
• 4.5
• 6.3

Tags

CCSS.HSS.ID.B.5

If the χ² _critical value = 5.99 and the
χ² _calculated value = 6.65 do you accept or reject the H_o hypothesis?

• Reject 
  >
  >
  >
• accept
• there is not enough info to decide

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

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

• 6
• 2
• 5
• 36

Tags

CCSS.HSS.ID.B.5

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.1

CCSS.HSS.MD.A.2

CCSS.HSS.MD.A.3

CCSS.HSS.MD.B.5

What statistical model does this graph illustrate?

• normal model
• t model
• chi square model