Question: The addition of a new accelerator is claimed to decrease

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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  • CreatedAugust 27, 2015
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