Question

a researcher want to perform a hypothesis to determine whether the mean credit card debt for credit card holders aged 18-35 14 greater than the mean credit card debt for credit card holders aged over 35. Then the proposed hypothesis test 19 Two-tailed best Right-talled test Lett-tailed text

Answer 1

Let the mean credit card for credit card holder aged 18-35 year be mu

And the mean credit card for credit holder age over 35 years be mu0

H0:mu=mu0 i.e. ( both age group have same mean credit card)

Vs

H1:mu> mu0 ( claim is that mean credit card for age group 18-35 is greater than the mean credit card holder for age above 35 year)

Here, we see that there is greater than sign in alternative hypothesis so, the test used will be right tailed. Left tailed or two tailed can't be used here as the alternative hypothesis do not have less than sign and not equal to sign here respectively.

So, option 2nd is correct.