Answer to Question #320135 in Statistics and Probability for Ali De Austria

Question

You are planning to buy a cellphone with a good quality in order to attend the online class.

The average price of 50 cellphones is Php13,500 with a margin of error of Php 273.65 and a

confidence level of 99%.

What is the lower limit?

What is the upper limit?

What is the confidence interval?

If you have P13,100.00, is the amount lies within the confidence interval?

Answer 1

% C.I=Lower Limit ,Upper Limit

sample mean=13500

margin error =273.65

lower limit =sample mean -margin error

lower limit =13500-273.65

lower limit =13226.35

Upper Limit=sample mean +margin error

Upper Limit =13500+273.65

Upper Limit =13773.65

99% Confidence interval =(Lower Limit ,Upper Limit )

99% Confidence interval =(13226.35,13773.65)

The amount P 13100 Iies outside the confidence interval