posted by Sarah S-Help! on .
A particular fruit's weights are normally distributed, with a mean of 308 grams and a standard deviation of 31 grams.
The heaviest 9% of fruits weigh more than how many grams?
Give your answer to the nearest gram.
so 91 percent weight X or below.
I get about 349 grams.
check it here.
You can also find table in the back of your statistics text labeled something like "areas under normal distribution" to find that proportion related to a Z score.
Z = (score-mean)/SD
Insert values and solve for score.