Ning lask NO 2: Write your answer on a separate shoot of paper The average price of 350 cellphones is Pts 13.500 with a sample standard
Pts 750
a. Find the 99% confidence interval of the true average pric
cellphones. Interpret your answer in the context of this problem
b. Find the length of the confidence interval.
Write all the given data based on the problem statement and
mplete solution.
formula to be used: a.
b.
solution:
z =
na Task Ne 3:
ele The table below by sup
th​

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.