Chi Square Practice

Find the degrees of freedom.

• 4
• 5
• 6
• 7

Tags

CCSS.HSS.IC.B.4

CCSS.HSS.IC.B.5

CCSS.HSS.ID.A.4

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

• 10.5
• 11
• 14.5
• 6.3

Tags

CCSS.HSS.CP.A.4

CCSS.HSS.ID.B.5

CCSS.HSS.MD.A.2

Which statement is NOT correct about the chi-square test statistic?

• a)A value close to 0 would indicate expected counts are much different from observed counts.
• b)A large value of the test statistic would be in support of the alternative hypothesis.
• c)A small value of the test statistic would indicate evidence supporting the null hypothesis.
• d)The test statistic is the sum of positive numbers and therefore must be positive.

The bigger the chi square statistic, the ________ the p value.

• bigger
• smaller

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

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.ID.A.2

CCSS.HSS.ID.A.3

CCSS.HSS.ID.B.5

Which of the following is false?

• A chi-squared distribution with k degrees of freedom is more right-skewed than a chi-square distribution with k+1 degrees of freedom.
• A chi-square distribution never takes negative values.
• The degrees of freedom for chi-square test is determined by sample size.
• The area under a chi-square density curve is always equal to 1.

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 is the null hypothesis?

• Injury type is independent of position played
• Injury type is dependent on the position played independent

Tags

CCSS.HSS.CP.A.2

CCSS.HSS.CP.A.3

The shape of the Chi-Square distribution is ___.

• Left Skewed

• Right Skewed

• Unimodal & Symmetric

• Bimodal & Symmetric

Tags

CCSS.HSS.ID.A.3