OnRamps Chi Square Test for Independence A

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

When determining the expected counts from a two way table, which formula should we use?

• (row total)(column total)/table total

• Number of categories minus 1

• row total minus 1

• column total minus 1

Tags

CCSS.HSS.MD.A.2

To verify large counts for any chi-squared test, we need to make sure our __________ counts are greater than ______.

• Expected, 5

• Observed, 5

• Expected, 10

• Observed, 10

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

• 10.5

• 11

• 14.5

• 6.3

Tags

CCSS.HSS.MD.A.2

How do we determine the degrees of freedom for a chi square test with two variables (homogeneity or independence)?

• (number of rows-1)(number of columns-1)

• Number of columns minus 1

• Number of Rows minus 1

• Table total minus 1

Find the degrees of freedom.

• 4

• 5

• 6

• 7

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

• 6

• 2

• 5

• 36

An individual wants to run a chi-squared goodness of fit test to determine how students in three different education settings (lecture, group work, individual online work) performed on an exam in terms of pass/fail. How many degrees of freedom would you require for this Goodness of Fit test?

• 2

• 1

• 3

• 5

A student wants to test the hypothesis that favorite car color is independent of gender. He shows people pictures of the same car in 5 different colors, and records their preference. How many degrees of freedom will there be in his X² test?

• 10

• 4

• 8

• Impossible to tell from the information given

Which significance level (column) do you look at when finding the critical value?

• .50
• .10
• .05
• .01

Tags

CCSS.HSS.ID.A.4