i. Z = (score-mean)/SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to that Z score.
ii. Reverse that process for this problem.
The weight of potatoes produced by one particular farm are found to be approximately
normally distributed, with the mean weight of 147 g and a standard deviation of 23g.
i. What proportion of the potatoes produced by this farm will weigh less than 160 g?
ii. Of all the potatoes produced on the farm, 5% are considered too light. What is the
maximum weight that will be considered too light?
1 answer
1 answer