Question:
The length of sweetpea flower stems are normally distrusted with mean and standard deviation .
(a) Find the probability that the length of a flower stem is between and .
(b) of the flower stems are longer than h cm. of the flower stems are shorter than k cm. Find and .
(c) Stem lengths less than are unacceptable at a florist's shop. In a batch of sweetpeas estimate how many would be unacceptable.
Attempt:
,
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Answer in textbook is 0.614
█ Don't know how to start, need help!
What does this mean ? The probability that the length is greater than 12% ? Writing would be OK : "the probability that the length of a stem is greater than equals 12%"
You'd better written what Mr Fantastic suggested :
hence
Whence
I let you redo the second one accordingly.
Yes...In textbook answer for h is 20.9 and k is 16.3 ?