Всем привет! Задача из курса статистики(на английском)

irinalili270999 в категроии Математика, вопрос открыт 16.02.2018 в 01:55

A survey of 36 randomly selected customers of the bookstore recorded their ages(in years). The sample mean and the sample standard deviation of take values 35 and 4 respectively.

a) estimate the mean age of customers of a bookstore.

b) construct a 95% confidence interval for the true mean age

c) what is the value of margin of error in b) ?