1. a uniform distribution is defined over the interval from 6 to 10 (show the calculations)

a) what are values for a and b

b) what is the mean of this uniform distribution?

c)what is the standard deviation

d) show that the total area is 1.00

e) find the probability of a value more than 7

f) find the probability of a value between 7 and 9

9. the mean of a normal probability distribution is 500: the standard deviation is 10.

a) about 68 percent of the observations lie between what two values?

b) about 95 percent of the observations lie between what two values?

c) practically all of the observations lie between what two values?

thank you :)