In: Statistics and Probability
Mean number of flights are 54 with a standard deviation of 13 What is the probability that the farmer will count 60 or fewer flights on average in the next 40 rows down? Round to four places
Solution :
Given that,
mean =
= 54
standard deviation =
= 13
n = 40
= 54
=
/
n = 13/
40=2.055
P(
< 40) = P[(
-
) /
< (60-54) / 2.055]
= P(z < 2.92)
Using z table
=0.9982
probability= 0.9982