Question

There are two groups (freshmen and juniors), and you are interested in whether freshmen express larger preference for social media than juniors do:

1) Formulate a (alternative) hypothesis

            2) What are H₀ and H1

3) What is the proper type of test for hypothesis test?

            4) Does it need one-tail test or two-tail test?

Q7. There is a group (females), and you are interested in whether their preference for iPhone is larger than that for Galaxy;

1) Formulate a (alternative) hypothesis

            2) What are H₀ and H1

3) What is the proper type of test for hypothesis test?

         4) Does it need one-tail test or two-tail test?

Answer 1

1) freshman express larger preference for social media than juniors

2)

Ho :   µ1 - µ2 =   0
H1 :   µ1-µ2 >   0

µ1 for freshman

µ2 for juniors

Ho: freshman express equal preference for social media than juniors

H1 :  freshman express larger preference for social media than juniors

3)  Hypothesis test: Difference of two means

4) one tail test

7)

i) females preference for iPhone is larger than that for Galaxy

ii)

Ho :   µ1 - µ2 =   0
H1:   µ1-µ2 >   0

µ1 for iphone

µ2 for galaxy

iii)   Hypothesis test: Difference of two means

iv)

one tail test

please revert for doubts