Mathematics, 26.02.2020 05:57 onlymyworld27
A large part of the luggage market is made up of overnight bags. These bags vary by weight, exterior appearance, material, and size. Suppose the volume of overnight bags is normally distributed with mean mu = 1750 cubic inches and standard deviation sigma = 250 cubic inches. A random sample of 15 overnight bags is selected, and the volume of each is found.
a. Find the distribution of X bar.
b. What is the probability that the sample mean volume is more than 1800 cubic inches?
c. What is the probability that the sample mean volume is within 100 cubic inches of 1750?
d. Find a symmetric interval about 1750 such that 95% of all values of the sample mean volume lie in this interval.
Answers: 3
Mathematics, 22.06.2019 01:00
Mia’s gross pay is 2953 her deductions total 724.15 what percent if her gross pay is take-home pay
Answers: 1
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