Blatchley Chapter 06 Posttest

. Which of the following pieces of information cannot be used to generate a z-score?

An individual's score, the mean and the standard deviation

A deviation score and variance

An individual's score, the mean and the interquartile range

The mean, the variance and the standard deviation

.

If Fernando's score on a test with a mean of 40 and standard deviation of 3 is 44, what is his z-score on the test?

1.33

-1.33

1.03

-1.03

. Which of the following options is true about the relationship between a z-score of 1.5 and a z-score of -0.67 in the same population?

A z-score of 1.5 is more common than a z-score of -0.67.

A z-score of 1.5 is further away from the tail ends of the distribution.

A z-score of 1.5 is located two times as far from the mean as a z-score of -0.67.

A z-score of 1.5 is located further to the right of the distribution than a z-score of -0.67.

.

Jeff's z-score on a test is -0.2. Which of the following options must be true?

Jeff scored better than 50% of other test takers.

Jeff scored worse than 98% of other test takers.

Jeff scored worse than 67% of other test takers.

Jeff scored better than 40% of other test takers.

. Which of the following options correctly describes the steps to find the difference in the probability of obtaining a z-score of at least -0.3 and a z-score of 1.2?

Add the probability of obtaining a z-score of more than 1.2 and the probability of obtaining a z-score less than -0.3.

Multiple the probability of obtaining a z-score of -0.3 and a z-score of 1.2.

Subtract the probability of obtaining a z-score of at least -0.3 from the probability of obtaining a z-score of at least 1.2.

Divide the probability of obtaining a z-score between -0.3 and 1.2 by two to get the probability difference.

Blatchley Chapter 06 Posttest

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