In a normal distribution, approximately what percent of data is within two standard deviations of the mean?
The graph of a normal distribution forms what shape?
If X~N(10, 22), then the standard deviation equals
Annual rainfall in Coastville is normally distributed with a mean of 60 cm and a standard deviation of 7 cm. For what percent of the years will the annual rainfall be between 53 cm and 60 cm?
For X~N (6, 22) the z-score of x = 4.5 is
The z-score corresponding to the 44th percentile is
If X~N(35, 32), what percent of the data are greater than 37? Round to the nearest percent.
If X~N(35, 32), what percent of the data are between 30 and 37? Round to the nearest percent.
If X~N(35, 32), what percent of the data are less than 29? Round to the nearest percent.
To earn a scholarship, Luc needs to score in the 87th percentile on an entrance test. If test marks are normally distributed with a mean of 400 and a standard deviation of 28, what mark (to the nearest whole number) is he aiming for?
Do your friends regularly tell you that you are different, or maybe crazy? Maybe, it is time to find out. Do not trust others' opinions. Take this easy quiz to find out if you are normal or possess some extraordinary traits...
Do you think your normal? If you're still having trouble sorting out if you're normal or strange, just take this quiz and sort out in the end if you're still normal or need professional mental medication.