95% = mean ± 1.96 SEm
SEm = SD/√n
I'll let you interpret.
A random sample of 20 people who resided within the u.s resulted in average viewing time of 4.76 hrs per day with a sample standard deviation of 2.297 hrs. obtain and interpret a 95% confidence interval, for the mean viewing time of all americans
confidence interval:
Interpert your answer:
1 answer