Question: 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

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.

5.2 6.4 3.8 6.3 4.1 2.8 3.2 4.7

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