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asambeis [7]
3 years ago
14

25 POINTS!!!!!!!!! ALGEBRA 2 STATISTICS QUESTION!!!!!!!!!!!!!!

Mathematics
1 answer:
Serga [27]3 years ago
6 0
A median is 65 inches and a standard deviation is 1.7:
a.   65 + 1 SD = 65 + 1.7 = 66.7 in
It means that there are : 100% - ( 50% + 34% ) = 100% - 84% = 16% students taller than 66.7 inches.
b.  Heights between 61.6 in and 68.7 in are within 2 standard deviations:
13.5% + 34% + 13.5% + 34% = 95%
0.95 * 300 = 285
There are 285 students between 61.6 in and 68.7 in tall. 
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Answer:

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Step-by-step explanation:

The area of a semicircle is

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We were also asked to use π as 3.14.

We substitute into the formula to get:

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This is the same as:

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