Mathematics, 21.04.2020 17:28 teamroper35
A random sample of 81 automobiles traveling on a section of an interstate showed an average speed of 60 mph. The distribution of speeds of all cars on this section of highway is normally distributed, with a standard deviation of 13.5 mph.
The value to use for the standard error of the mean is:
1.13.5
2.9
3.2.26
4.1.5
Answers: 2
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