Lower quartile=39, Upper quartile=63.

Question

Measurements of wind speed on a certain island were taken over a period of one year. A box-andwhisker
plot of the data obtained is displayed above, and the values of the quartiles are as shown.
It is suggested that wind speed can be modelled approximately by a normal distribution with mean
μ kmh−1 and standard deviation s kmh−1.
(i) Estimate the value of μ. [1]
(ii) Estimate the value of s.

Answer 1

Ans are (i)51 and (ii)17.8. pls help

Answer 2

X~N (51,s^2)
P(X<39)=0.25
solve to find s
Ans: 17.804

Answer 3

Lol. No