Question

A set of 50 data values has a mean of 22 and a variance of 16.
I. Find the standard score (z) for a data value = 14.
II. Find the probability of a data value < 14.

Answer 1

1).a set of 50 data values has a mean of 40 and a variance of 25.
a). Find the standard score (z) for a data value = 47.
z(47) = (47-40)/25 = 0.28
b). Find the probability of a data value > 47.
P(x> 47) = P(z > 0.28) = 0.3897

(2). Find the area under the standard normal curve:
I. to the right of z = 1.83
P(z > 1.83) = 0.0336

II. to the left of z = 1.83
P(z < 1.83) = 1-0.0336 = 0.9664

Answer 2

thanks

Answer 3

bradley Your Welcome :D