Chapter 15

Question 1

How to determine degress of freedom in chi square test

Answer 1

k-1

Question 2

What is the symbol for the chi square test statistic

Answer 2

X^2

Question 3

What does fo represent

Answer 3

Observed frequency in a specific category

Question 4

What does fe represent

Answer 4

expect frequency in specific category

Question 5

What is the formula for chi square test

Answer 5

Sum((f0-fe)^2/fe

Question 6

What are the three characteristics of a chi square distribution

Answer 6

1. Always greater than or equal to zero
2. It is a family of distributions based on the degrees of freedom
3. They are positively squared.

Question 7

What are two limitations to the chi square test

Answer 7

1. If there are two categories with, they need to have an expected frequency of at least 5
2. If there are more than two categories, then at least 20% of them need to have a frequency of more than 5

Question 8

How do you determine the df when using chi sq to test normality

Answer 8

1. Population mean and standardiviation are known, k-1
2. Population mean is known but standard deviation is estimated, K-2
3. When population and deviation are estimated, k-3

Question 9

What is the method of determining the degrees of freedom when using chi square to test for independence on a contingency table

Answer 9

df = (r-1)(c-1)

Question 10

How to calculate expected frequency on chi square independence test

Answer 10

((row total)*(column total))/grand total