Chi-squared

Question 1

step 1

Answer 1

*look at contingency table
* add columns and rows
* label all the original values in the table with O

Question 2

step 2

Answer 2

• calculate the expected frequencies
• row total x column total / grand total of all cells
  *label this value E

Question 3

step 3

Answer 3

• substitute values into given value to find OV
• calculate each cell (O-E)^2/ E
• then add all cells together

Question 4

step 4

Answer 4

• calculate the degrees of freedom: row- 1x column -1
  *look at critical value table