How can i approach this hypothesis testing problem? I know from the data i can find the mean, variance and standard deviation of the sample but in order to calculate, i would need a way to find the population mean... Photo attached of the problem.

Question

anonymous · Answer

attachment

amistre64 · Answer

what is our best point estimator when population mean is unknown?

amistre64 · Answer

it looks more like a 2 sample test to me, but thats not to infer its a good thought

amistre64 · Answer

Ho, there is no difference,  Ha, there is a difference

amistre64 · Answer

Ho:  u1 - u2 = 0 ,  there is no difference.

Ha: u1 - u2 not= 0,  there is a difference.

amistre64 · Answer

thought they might come back eventually lol

amistre64 · Answer

out test stat is:

$$t=\frac{\mu_1-\mu_2}{\sqrt{var(x_1)+var(x_2)}}$$