Mathematics: The mean shoe size of the students in a math class is 7.5. most of the shoe sizes fall within 1 standard deviation, or between a size 6 and a size 9. what is the standard deviation of the shoe size data for the math class? a.1.5 b.2.7 c.3.0 d.3.8

The mean shoe size of the students in a math class

Ответ:

greg777

04.01.2022

The formula of standard deviation is
SD = square root of (variance)

Variance is the average of the squared differences from the Mean.
Variance = (6-7.5)^2 + (9-7.5)^2 / 2
Variance = 2.25

SD = square root (2.25)
SD = 1.5

The correct answer is A. 1.5

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Ответ:

deemy0292

10.03.2022

Mathematics

+5,-1 or -1,+5
I think the first one I said is correct

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The mean shoe size of the students in a math class is 7.5. most of the shoe sizes fall within 1 standard deviation, or between a size 6 and a size 9.

what is the standard deviation of the shoe size data for the math class?
a.1.5
b.2.7
c.3.0
d.3.8

Ответ:

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