Exam 4: The Normal Curve and Z Score

Find the percentiles for the following: the mean score on a test of psychopathy among a group of incarcerated inmates is 50, with a standard deviation of 10. Assume a normal distribution, and find the Percentile for the following psychopathy scores: -48

On a normal distribution with a mean of 150 and a standard deviation of 17, what percentage of cases will fall between 129 and 145?

All percentiles above 50 must yield negative z scores.

On a normal distribution the mean and median coincide.

Under the normal curve, 50% of the cases must always fall

The standard score is synonymous with the raw score.

Under the normal curve, between the z scores of + 1 and + 2, there are always

Between two negative z scores there must always be

Percentage of scores falling between a z of -1.73 and the mean

When more than 34% of the cases under the curve fall between the mean and a z score of + 1, then

On a normal distribution with a mean of 200 and a standard deviation of 50, what percentage of cases will fall between raw scores of 185 and 195?

The closer a given z score is to 0, then the closer it is

A raw score of 200 would translate into a z score of

Under the normal curve, the mean falls below the 50th percentile only when

A positive z score must always yield a percentile which is

On a normal distribution with a mean of 500 and a standard deviation of 97, what percentage of cases will fall between 470 and 550?

On a normal distribution with a mean of 100 and a standard deviation of 7, what percentage of cases will fall between 129 and 145?

The numerical difference between the raw score and the mean, when divided by the standard deviation, yields the

A negative z score always yields a percentile of less than 50.

When the mean and median do not coincide, then