10

Question 1

How to count pairs in a table (cross classification)?

Answer 1

xtabs(~column1+column2, data)

Question 2

Chi-squared test to determine whether two variables are independent?

Answer 2

results = chisq.test(matrix), assumption: expected value at least 5 results$expected

Question 3

Chi-squared goodness of fit test?

Answer 3

H0 is when there are many proportions as probabilities x/6 that equal to one at the end. Ha when at least one of these are wrong.

results <- chisq.test(observed, probabilities,

results$expected at least 5