Step-by-step explanation

null hypothesis:

average cholesterol level of patients in intensive care is equal to 200

sample mean, x = 201.2

sample standard dev, sd = 42.3986

standard error, se= sd/sqrt n = 42.3986/sqrt 20

se =9.4806

t stat = ( x -u)/se

t stat = (201.2-200)/9.4806

t stat =0.1266

df = n - 1 = 20 -1 =19

t crit at 0.05 alpha level and df = 2.0930

How do we get ? p value = 0.4503?