4. This is simply an exercise in using the definitions and tables of standard normal,
and t distributions.
The random variables are independent and identically distributed
as for i = 1, 2, 3. Find the following probabilities:
a. P( < 3)
b. P( < 5)
c. P( < 7)
d. P(> 2)
Part (a) I can do. Part (b) i'm having trouble with as the normal distribution is isn't a standard normal so i'm not sure how to use the distribution.
... and the ones that won't