HGE 1110 ▬ STATISTICS AND PROBABILITY ▬ Q3 - WW8

Which of the following best describes a normal distribution?

• The scores are skewed to the right.

• The mean, the median, and the mode are equal.

• The scores are skewed to the left.

• The scores are concentrated more at one end or the other end.

About how many percent of the distribution lies between 2 units standard deviations from the mean?

• 68%

• 95%

• 99.7%

• The answer cannot be determined because of insufficient data.

Which of the following is NOT true about normal distribution?

• The mean, median, and mode are equal.

• The mean is not the center of the distribution.

• It is symmetrical about the mean value.

• The standard deviation does not affect the shape of the normal curve.

Which of the following is a characteristic of a normal distribution?

• The mean, median, and mode are not necessary equal.

• The mean is not the center of the distribution.

• It is symmetrical about the mean value.

• The standard deviation does not affect the shape of the normal curve.

The standard deviation of a standard normal distribution is _____.

• 0

• 1

• 2

• 3

The mean value of the standard normal distribution is _____.

• 0

• 1

• 2

• 3

Sixty-eight percent of the scores under the normal curve lies between how many standard deviations from the mean?

• ±1 sd

• ±2 sd

• ±3 sd

• ±4 sd

Ninety-five percent of the scores under the normal curve lies between how many standard deviations from the mean?

• ±1 sd

• ±2 sd

• ±3 sd

• ±4 sd

Ninety-five point seven percent of the scores under the normal curve lies between how many standard deviations from the mean?

• ±1 sd

• ±2 sd

• ±3 sd

• ±4 sd

Which of the following DOES NOT belong to the group?

• Height of Grade 11 students

• Weight of Grade 11 students

• IQ of Grade 11 students

• Number of orange in a basket