RDS2 EXAM 1

If we compute a boundary value for performance by converting a pre-determined z-score such as +2.00 to a raw score, and then use that raw score to make decisions about individuals (such as whether they should receive a special program), that raw score is called a: : A. z-scoreB. cutpoint scoreC. boundary definerD. flag score

Alicia scored a 70 on her psychology quiz, but the class as a whole averaged a 40. If the standard deviation was 10, what was Alicia's z-score? : A. +3B. -3C. -0.3D. +0.3

Z-scores communicate a score's : A: absolute magnitudeB. relative location in a distributionC. distance from a population standard deviationD. variability

The mean score of a z-score distribution is always _______, and the standard deviation is always _________ : A. 0; 10B. 0; 1C. 100; 20D. 1; 0

Which of the following assumptions is common to both the z-test and the one sample t-test? : A. alpha is selected to be 0.01B. the raw score population forms a normal distribution, and the population mean and standard deviation are knownC. the standard deviation of the raw score population is estimated by sxD. there is one random sample of interval ratio scores

Which of the following would increase the power of a t-test? : A. changing alpha from 0.05 to 0.01B. increasing the variability in the raw scoresC. changing the sample size from N=25 to N=100D. changing the sample size from N=100 to N=25