Areas of the proportion within the normal curve are: 1) either positive or negative  2) always negative  3) always positive  4) none of previous choices

1. For a normal distribution, find the percent of scores that lie between the scores having z values of z = -4 and z = 6

Examine the normal quartile plot and determine whether it depicts sample data from a population with a normal distribution  Does the normal quantile plot depict sample data from a population with a normal distribution? A. No. The points do not lie close to a straight lineB. Yes. The points are evenly distributed above and below the mean, 0C. The points exhibit some systematic pattern that is not a straight-line patternd. Yes. The pattern of the points is reasonable close to a straight line.

In a bell-shaped, normal distribution,   a. mode = 0   b. median > mean   c. median < mean   d. median = mean