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4) a. A few mechanics on a Toyota showroom identified that they attend an average of (B + A) cars per week. Assume the standard deviation is A. A random sample of 26 weeks was chosen. Find the 90% confidence interval for mean. b. Estimate the 95% confidence interval for the standard deviation if a research of (A + 8) Chocolate brands shows that the number of A calories as standard deviation for these Chocolate brands. Assume the variable is normally distributed. Note that: A is first two-digit number (before English alphabet letter) from your college ID. B is last four-digit number (after English alphabet letter) from your college ID. For example, if your MEC ID is 16F23451, then A = 16 and B 3451 %3D

4) a. A few mechanics on a Toyota showroom identified that they attend an average of (B + A) cars per week. Assume the standard deviation is A. A random sample of 26 weeks was chosen. Find the 90% confidence interval for mean. b. Estimate the 95% confidence interval for the standard deviation if a research of (A + 8) Chocolate brands shows that the number of A calories as standard deviation for these Chocolate brands. Assume the variable is normally distributed. Note that: A is first two-digit number (before English alphabet letter) from your college ID. B is last four-digit number (after English alphabet letter) from your college ID. For example, if your MEC ID is 16F23451, then A = 16 and B 3451 %3D

A First Course in Probability (10th Edition)
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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4) a. A few mechanics on a Toyota showroom identified that they attend an average of (B+ A) cars per week. Assume the standard deviation is A. A random sample of 26 weeks was chosen. Find the 90% confidence interval for mean. b. Estimate the 95% confidence interval for the standard deviation if a research of (A + 8) Chocolate brands shows that the number of A calories as standard deviation for these Chocolate brands. Assume the variable is normally distributed. Note that: A is first two-digit number (before English alphabet letter) from your college ID. B is last four-digit number (after English alphabet letter) from your college ID. For example, if your MEC ID is 16F23451, then A = 16 and B 3451 %3D
Transcribed Image Text:4) a. A few mechanics on a Toyota showroom identified that they attend an average of (B+ A) cars per week. Assume the standard deviation is A. A random sample of 26 weeks was chosen. Find the 90% confidence interval for mean. b. Estimate the 95% confidence interval for the standard deviation if a research of (A + 8) Chocolate brands shows that the number of A calories as standard deviation for these Chocolate brands. Assume the variable is normally distributed. Note that: A is first two-digit number (before English alphabet letter) from your college ID. B is last four-digit number (after English alphabet letter) from your college ID. For example, if your MEC ID is 16F23451, then A = 16 and B 3451 %3D
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