estimate approximate standard deviation to be 2400/4=600
mu=2500, standard deviation 600, above 2400
My calculator says... 0.5662
http://davidmlane.com/hyperstat/z_table.html
According to genetic theory, plants of a particular species have a 25% chance of being red-flowering, independently of other plants. Find the normal approximation to the chance that among 10,000 plants of this species, more than 2400 are red-flowering.
1 answer