Well I assume you have a TI-84 or something
a) null is μa = μb
alternate is μa > μb
where μa = the true mean number of fish contrained in the stomach of blue crabs in location A
μb = the true mean number of fish contrained in the stomach of blue crabs in location B×
B) this is a 2 sample t-test
t= (xa-xb)/ [tex]\sqrt{s1^{2} /n1+ s2^{2} /n2}[/tex] so you find the t value and look up on the T- table
or you use your calculator
t= 0.549 ⇒ p= 0.295
since out p value of 0.295 is greater than our alpha level of 0.01, we have no evidence to conclude that the stomachs of blue crabs from Location A contain more fish than the stomachs of blue crabs from Location B.
you also might want to check the assumptions.
