11.1 Exit Ticket Chi-Square GOF

How many degrees of freedom will be present?

• 4
• 5
• 6
• 7

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

• bigger
• smaller

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

What statistical model does this graph illustrate?

• normal model
• t model
• chi square model

Tags

CCSS.HSS.ID.A.4

CCSS.HSS.MD.A.1

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

The purpose of blinding is to reduce

• bias
• confounding
• variability
• consistency

Tags

CCSS.HSS.IC.B.3

Which is NOT a mandatory part of a good experiment?

• control
• randomization
• replication
• blocking

Tags

CCSS.HSS.IC.B.3

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

In a chi square goodness of fit test, you must have

• counts for two categorical variables
• proportions for one categorical variable
• counts for one categorical variable
• proportions for two categorical variables

Is there evidence that income levels are not evenly distributed across the entire population? What is the p value and chi square statistic?

Category Observed

Affluent 11

Upper Middle Class 50

Middle Class 32

Lower Middle Class 8

Working Class 10

Poor 1

TOTAL 112

• yes, p value is 0, chi square statistic = 92.11

• yes, p value is .242, chi square statistic = 43.98

• no, p value is 0, chi square statistic = 92.11

• no, p value is 2.42, chi square statistic = 43.98