Use this information to answer questions 8-10. A set of sample scores from an experiment has an N = 28 and a mean = 58. H1is directional, predicting an effect of the independent variable which decreases the magnitude of the dependentvariable. H0predicts that the sample is a random sample from a population of scores wherethe population mean= 61 andthe population standard deviation = 12. Alpha= 0.05 (one tailed). What is z obtained? 0.250 1.870 2.234 -1.327