Question
In: Statistics and Probability
What are the key parameters of the distribution? What is the Mean? what is the Standard deviation?
What are the key parameters of the distribution?
What is the Mean?
what is the Standard deviation?
Solutions
Expert Solution
Observe the given curve .It is symmetric and bell shaped.
So the distribution is NORMAL.
The curve is symmetric about 20.
So , mean = 
= 20
We know that almost all the observations under normal
distribution lie between - 3
and
+3
So, - 3 = 0 and
+ 3 = 40
-
3 = 0
20 -
3 = 0
20 =
3
= 20/3 =
6.6667
Standard deviation =
6.6667
orchestra answered 2 years agoRelated Solutions
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