Question 1058428
This is a t-test with t(df=23)
t=(x-mean)/s/sqrt(n)=(x-mean)*sqrt(24)/s
=(78-73)*sqrt(24)/7.8=3.14
That is the probability that t df=23 is >3.14.
From the table, t (0.995,23)=3.10
The probability or p-value here is <0.005 (it is 0.0046)