The addition of a new accelerator is claimed to decrease the drying time of latex paint by

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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 decreases in drying time:

a. Find the sample mean.
b. Find the sample standard deviation.
c. Do you think these percentages average 4 or more? Explain.

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Elementary Statistics

ISBN: 9780538733502

11th Edition

Authors: Robert R. Johnson, Patricia J. Kuby

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Question Posted: Aug 27, 2015 07:02 AM

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The addition of a new accelerator is claimed to decrease the drying time of latex paint by

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5.2 6.4 3.8 6.3 4.1 2.8 3.2 4.7

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Data summary n 8 x 365 x 1791...View the full answer

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