Question

given that u=100 X=91, s=27, and N=30
(a)calculate t.
(b)write a sentence interpreting the value of t as a two- tailed test.
(c)write a sentence interpreting the value of t as a one-tailed test.

Answer 1

Formula for a t-test:

t = (sample mean - population mean)/(standard deviation divided by the square root of the sample size)

I'll let you take it from here.