Information about test norms allows you to equate scores across different tests of the same construct and lets you compare individuals to each other. Once you have the standard deviation of a score, you can calculate an individuals z-score. Z-scores, also known as standard scores, tell you how many standard deviations away from the mean an individual is. Scores that are two standard deviations away from the mean represent the most extreme 5% of the population and often are considered to be unusual enough to warrant special consideration, such as a clinical diagnosis. For instance, IQ scores that are two standard deviations above the mean (130 or greater) are considered in a gifted range and scores two standard deviations below the mean (70 or lower) are considered intellectually deficient. Scores on measures of depression that are two standard deviations above the mean often are considered to represent clinical depression.
T-scores are another kind of standard score; the MMPI is the best known example of a test that uses T-scores. (Note that T-scores have nothing to do with t-tests.) Z-scores have a mean of 0 and a standard deviation of 1; T-scores have a mean of 50 and a standard deviation of 10. Thus, the average score on a test would be assigned a T-score of 50 and a z-score of zero. A score that was one standard deviation below average would be assigned a T-score of 40 and a z-score of -1.
For this Knowledge Assessment, you consider how raw test scores can be converted into more meaningful standardized scores, allowing you to meaningfully compare tests and to compare individuals.
In the provided dataset, you previously created a Risk-Taking scale by adding items R1 through R6.
Note: Please refer to the following image to complete question #3.
Multiple AttemptsNot allowed. This test can only be taken once.Force CompletionThis test can be saved and resumed later.
Question Completion Status:
What are the mean and standard deviation for the Risk-Taking scale (ANALYZE>DESCRIPTIVE STATISTICS>DESCRIPTIVES)?a.17.08, 5.02b.14.23, 6.01c.18.95, 3.76d.16.23, 7.22
George obtained a raw score of 20 on the Risk-Taking scale. What is his z-score?a.-0.23b.0.03c.0.58d.1.63
Given Georges z-score, what is his approximate percentile? Use the chart above to formulate your answer.a.56b.58c.72d.80
T-scores are used on some psychological tests, such as the MMPI. T-scores have a mean of 50 and a standard deviation of 10; therefore, a z-score of -1 (one standard deviation below the mean) would be converted to a T-score of 40. What is Georges T-score on the Risk-Taking scale?a.45b.56c.58d.66
Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.
You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.Read more
Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.Read more
Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.Read more
Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.Read more
By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.Read more