The mean is 0 and the standard deviation is 1.Your answer is correct.D.The mean is 10 and the standard deviation is 100.
Scores on a test are normally distributed with a mean of 63.2 and a standard deviation of 11.7. Find Upper P 81P81, which separates the bottom 81% from the top 19%. Round to two decimal places.
In one region, the September energy consumption levels for single-family homes are found to be normallydistributed with a mean of 1050 kWh and a standard deviation of 218 kWh. For a randomly selected home, find the probability that the September energy consumption level is between 1100 kWh and 1225 kWh. Round to four decimal places.