Question

The null hypothesis for the dependent t-test is essentially the same as

)	Null hypothesis for a 1 group t-test

B)	The effect size

C)	Null hypothesis for a Z-score hypothesis test

D)	Null hypothesis for a two independent groups t- test

Answer 1

Option D is correct.

( The reason is, in two independent group x and y t test, we test the hypothesis :

H0 : Xbar - Ybar = 0

v/s H1:xbar - ybar not equal to zero

That is we check

H0 : the two groups have same average values.

V/s H1 : two groups have different average values.

In depedent t test (paired t test),

We check

H0 : difference between the values is 0

V/s H1 : difference between the values is present

H0 : d = 0 v/s H1 : d > 0 or < 0

That is checking average of difference is 0 or not,

These hypthesis are similar and deals with same purpose.