Question

1.) T or F. The area under the normal curve is split 50/50 about the y-axis. 2.) T or F. A z number of 2.34 means that the data is 2.34 standard deviations below the mean. 30. T or F. the probability to the right of z=-1.34 .0901 4.) T or F. under normal curve, the area to the left of z=0.84 is 0.2

Answer 1

a)

Right

Since mean of standard normal distribution is 0 and P(Z < 0) = P(Z > 0) = 0.5

b)

False

If z = 2.34 (positive value)

This means the data is 2.34 standard deviations above the mean

c)

P(z > -1.34) = P(Z < 1.34) = 0.9099

False

d)

P(z < 0.84) = 0.7995

False.