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ondreduty1789
17.05.2021 •
Mathematics
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Ответ:
a) The third quartile Q₃ = 56.45
b) Variance![\mathbf{ \sigma^2 =2633.31}](/tpl/images/0678/6366/8155a.png)
Step-by-step explanation:
Given that :
Median
= 48.5
Mean = 42
a) The mean is less than median; thus the expression showing the coefficient of skewness is given by the formula :
Divide both sides by 1.38
b) The objective here is to determine the approximate value of the variance;
Using the relation
Variance =![\sigma^2 =51.32^2](/tpl/images/0678/6366/24594.png)