The Essentials of Statistics 3rd Edition by Joseph Healey

تمرين 4

For a normal distribution where the mean is 50 and the standard deviation is 10, what percentage of the area is
a. between the scores of 40 and 47? _____________
b. above a score of 47? _____________
c. below a score of 53? _____________
d. between the scores of 35 and 65? ____________
e. above a score of 72? ______________
f. below a score of 31 and above a score of 69? _____________
g. between the scores of 55 and 62? ______________
h. between the scores of 32 and 47? _____________