Question

To check if there is a connection between having or not having diabetes and obese people, which hypothesis test should you use?

a. test for proportion

b. test for independence between two factors

c. test for the difference of means in paired samples

d. test mann. whitney.

e. other()

Check if opinion(agree/disagree) of people about abortion before and after a referendum.

a. test for the diference of means in paired samples.

b. test for homogeneity in proportions

c. test for the difference in means in independent samples

d. other()

I think is b in the first one, but i am not sure, mainly because i dont really get the mann whitney test.

In the second one I think is a, but i dont understand in what context you should use test mention in b.

Answer 1

1)We have to see if having diabetes is related to being obese or not, we shall do chi square test of independence here

option B is right

The Mann-Whitney test is generally taken as the nonparametric alternative to the independent t-test.

2)Check if opinion(agree/disagree) of people about abortion before and after a referendum.

opinion can be shaped in proportion, we can check if the proportion of people who agree about abortion before & after the referendum change or not

option B is right

Z test for two proportion can be used here.