Author Question: For a standard normal curve, find the z-score that separates the bottom 70 from the top 30. A) ... (Read 45 times)

tichca · **on:** Jul 25, 2018

For a standard normal curve, find the z-score that separates the bottom 70 from the top 30.

A) 0.12 B) 0.98 C) 0.47 D) 0.53

Question 2

Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. A vending machine will only accept coins weighing between 5.48 g and 5.82 g. What percentage of legal quarters will be rejected?

A) 2.48 B) 1.96 C) 0.0196 D) 1.62