17.9 chi- squared test

Question 1

how do you calculate degree of freedom?

Answer 1

number of classes -1

Question 2

is the null hypothesis accepted or rejected when X^2 is less than 5%?

Answer 2

reject null hypothesis

Question 3

is the null hypothesis accepted or rejected when X^2 is more than 5%?

Answer 3

accept null hypothesis

Question 4

chi squared

Answer 4

sum of (Observed - Expected)^2/ Expected

Question 5

if null hypothesis is accepted?

Answer 5

any difference is due to chance and not significant

Question 6

if null hypothesis is rejected?

Answer 6

any difference is not down to chance and significant

Question 7

what is the null hypothesis?

Answer 7

no statistically significant difference between the observed and expected and any difference is due to chance