2) In a pollution study of the air in a certain downtown area, an EPA technician obtained a mean of 4.55 microgram of suspended bezene soluble matter per cubic meter with a standart deviation of 0.72 microgram for a sample of size n=9. Assuming that the population sampled is normal, a) Construct a 90% confidence interval for the mean of the population sampled; b) What can the technician assert with 95% confidence about the maximum error if x (mean)=4.55 micrograms per cubic meter is used as an estimate of the mean of the population sampled?

2) In a pollution study of the air in a certain downtown area, an EPA technician obtained a mean of 4.55 microgram of suspended bezene soluble matter per cubic meter with a standart deviation of 0.72 microgram for a sample of size n=9. Assuming that the population sampled is normal, a) Construct a 90% confidence interval for the mean of the population sampled; b) What can the technician assert with 95% confidence about the maximum error if x (mean)=4.55 micrograms per cubic meter is used as an estimate of the mean of the population sampled?

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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