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jackchris2732
21.02.2020 •
Mathematics
The distribution of the annual incomes of a group of middle management employees approximated a normal distribution with a mean of $37,200 and a standard deviation of $800. About 68% of the incomes lie between what two incomes
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Ответ:
68% of the incomes lie between $36,400 and $38,000.
Step-by-step explanation:
We are given the following information in the question:
Mean, μ = $37,200
Standard Deviation, σ = $800
We are given that the distribution of SAT score is a bell shaped distribution that is a normal distribution.
Empirical rule:
Almost all the data lies within three standard deviation of mean for a normally distributed data.About 68% of data lies within one standard deviation of mean.About 95% of data lies within two standard deviation of mean.About 99.7% of data lies within three standard deviation of mean.Thus, 68% of data lies within one standard deviation.
Thus, 68% of the incomes lie between $36,400 and $38,000.
Ответ:
Coordinates of X = (16,-15).