posted by Fran on .
(Find Normal Proportions)
The lengths of Atlantic croaker fish are normally distributed with μ = 10 inches and σ = 2 inches.
a) Draw the distribution of fish lengths above the axis, and label the mean (which I believe is μ=10).
b)Gently shade an area on the graph that is equal to the proportion (or percentage) of croaker fish that are between 7 and 15 inches long.
c) Draw the standard normal distribution, label the axis, locate both z-scores on the axis (z7 = -1.5, z15 = 2.5), and shade an area equal to the probability that a randomly chosen croaker fish will be b/t 7 and 15 inches.
We cannot draw distributions on this message board.
b. Z = (score-mean)/SD
Z = (7-10)/2
Z = (15-10)/2