The expression (zºy225)
(25y22)5
equals where
zt
r, the exponent of y, is:
s, the exponent of z, is:
t, the exponent of x, is:
> Next Question

Anormally distributed data set has a mean of 176.3 and a standard deviation of 4.2. what is the approximate z-score for the data value of 167.9? 2.00 −2.00 8.4 −8.4