S2! Simple question about means/SD!

3ivB:

I worked this out:
Braeburn: mean = 210.5 SD = 15.2
cos: mean = 185 SD = 11.7

I understand how to plot SD/variance and the means, but I don't know how you can tell which has the higher and lower max heights?

Reply 1

Joshmeid

5

Original post by superxo2

3ivB:

I worked this out:
Braeburn: mean = 210.5 SD = 15.2
cos: mean = 185 SD = 11.7

I understand how to plot SD/variance and the means, but I don't know how you can tell which has the higher and lower max heights?

How many have achieved the mean value?

Reply 2

username616640

OP

2

Original post by Joshmeid

How many have achieved the mean value?

this is the question

question 1231232.png

Reply 3

Blazy

8

Original post by superxo2

3ivB:

I worked this out:
Braeburn: mean = 210.5 SD = 15.2
cos: mean = 185 SD = 11.7

I understand how to plot SD/variance and the means, but I don't know how you can tell which has the higher and lower max heights?

The one with the bigger standard deviation will be more 'spread out' so it's going to have a lower peak. Alternatively:

\displaystyle \frac{1}{\sigma \sqrt{2\pi}}

will give you the max height of the distribution.

S2! Simple question about means/SD!

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