A Set of Sample Scores from an Experiment Has an N

question 14

Multiple Choice

A set of sample scores from an experiment has an N = 28 and a mean = 52. H 1 is directional, predicting an effect of the independent variable which decreases the magnitude of the dependent variable. H 0 asserts the sample is a random sample from a population of scores where µ = 55 and s = 12. a = 0.05_{1 tail}. Using the z test to analyze the data, z obt = _________.

• A) - 1.322
• B) - 0.250
• C) - 7.000
• D) - 0.132

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