STATS [QUIZ 4] - THE NORMAL CURVE AND Z-SCORE

Which of the following is always true of a normal distribution?

a. it is skewed.

b. there are two inflection points

c. it is an empirical distribution

d. there are more scores above the mean than below it

there are two inflection points

The theoretical normal (z) curve has mean equal to _____ and a standard deviation equal to _____.

a. 1.00; 0.00

b. 0.00; 1.00

c. 1:00; 1;00

d. 0.00; the standard deviation of the population

0.00; 1.00

Associated with a point of inflection on a normal curve is…

a. the mean

b. one standard deviation

c. the asymptote

d. the most extreme score

one standard deviation

Suppose a student has a z score of -1. This means she

a. scored well above the mean

b. has a negative raw score

c. scored one standard deviation below the mean

d. had the lowest score in the group

scored one standard deviation below the mean

If you knew that scored were distributed normally and you wanted to find the number people who scored between 150 and 175, you would need to know…

a. the number in the population

b. the mean of the population

c. the standard deviation of the population

d. all of the above

all of the above