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jose0765678755
14.07.2019 •
Mathematics
The lengths of one-year-old baby girls can be described using a normal distribution with a mean of 29 inches and a standard deviation of 1.2 inches. using the 68-95-99.7 rule, what percent of one-year-old girls are smaller than 27.8 inches?
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Ответ:
The '68-95-99.7 ' rule says,
-About 68% of values fall within one standard deviation of the mean.
-About 95% of the values fall within two standard deviations from the mean.
-Almost all of the values — about 99.7% — fall within three standard deviations from the mean.
Here
The length falls within one standard deviation of the mean.
Therefore, the probability![P(27.8](/tpl/images/0088/4862/b3fbf.png)
The required probability is
Ответ:
110698.56 square miles
step-by-step explanation:
multiply 3.8 by 102
387.6
multiply 2.8 by 102
285.6
multiply those two to get
110698.56 square miles