SOC 390 Concept Quiz Z-Scores

Question 1

1 / 1 pts

The fact that the tails of a normal distribution never touch the horizontal axis relates to the following property: ______.

asymptotic

symmetrical

approximate

equidistant

Question 2

1 / 1 pts

If you fold a normal curve, each half would fit perfectly on top of the other. This characteristic is known as _______.

asymptotic

symmetry

probability

variability

Question 3

1 / 1 pts

Which of the following is true of z scores that fall below the mean?

They are equal to the mode.

They are negative.

They are positive.

They are in the upper half of the distribution.

Question 4

1 / 1 pts

In a normal curve, around ______ of the curve falls between -1 and +1 standard deviations of the mean.

14%

95%

34%

68%

Question 5

1 / 1 pts

Martha has a raw score of 36 and wants to calculate the z-score. What other information does she need to know?

the mean, median, and mode

the mean and the standard deviation

the mode and the standard deviation

the mean and the sampling error

Question 6

1 / 1 pts

The normal curve has no skew.

True

False

Question 7

1 / 1 pts

Scores that occur in the extremes of the normal curve:

indicate skew in the normal curve.

are closest to the mode than scores toward the center of the distribution.

should be excluded from the normal curve

have a very small probability of occurring.

Question 8

1 / 1 pts

Z-scores can be used for all of the following EXCEPT:

determining the association between two variables.

determining the area of a distribution that is below a positive z-score.

determining the area of a distribution that falls above a particular score.

determining the area of a distribution that falls between two scores.

Question 9

1 / 1 pts

A z-score represents:

the distance between two sample means in terms of standard deviations

the amount of error in a sampling distribution

the statistical significance of a sample mean.

the distance between a raw score and the mean in terms of standard deviations.

Question 10

1 / 1 pts

You CAN do statistics, including z-scores!! (Hint: it’s TRUE!)

True

False

Quiz Score: 10 out of 10