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1. The addition of a new accelerator is claimed to decrease the drying time of latex paint by more than 4%. Several test samples were conducted with the following percentage decrease in drying time: 5.2 6.4 3.8 6.3 4.1 2.8 3.2 4.7 (a) Construct a 95% confidence interval for the mean percentage decrease in drying time. (b) Based on the confidence interval in (a), can we conclude that the new accelerator decreases the drying time by more than 4%? Why?

1. The addition of a new accelerator is claimed to decrease the drying time of latex paint by more than 4%. Several test samples were conducted with the following percentage decrease in drying time: 5.2 6.4 3.8 6.3 4.1 2.8 3.2 4.7 (a) Construct a 95% confidence interval for the mean percentage decrease in drying time. (b) Based on the confidence interval in (a), can we conclude that the new accelerator decreases the drying time by more than 4%? Why?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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1. The addition of a new accelerator is claimed to decrease the drying time of latex paint by more than 4%. Several test samples were conducted with the following percentage decrease in drying time: 5.2 6.4 3.8 6.3 4.1 2.8 3.2 4.7 (a) Construct a 95% confidence interval for the mean percentage decrease in drying time. (b) Based on the confidence interval in (a), can we conclude that the new accelerator decreases the drying time by more than 4%? Why?
Transcribed Image Text:1. The addition of a new accelerator is claimed to decrease the drying time of latex paint by more than 4%. Several test samples were conducted with the following percentage decrease in drying time: 5.2 6.4 3.8 6.3 4.1 2.8 3.2 4.7 (a) Construct a 95% confidence interval for the mean percentage decrease in drying time. (b) Based on the confidence interval in (a), can we conclude that the new accelerator decreases the drying time by more than 4%? Why?
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