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Chapter 8 & 9 handout - Dr. Huselid, Psych248 F21 - One-sample Hypothesis test using z & t An educator wishes to know if the mean IQ score for students in her school district is greater than the population mean of u = 100 ( = 15). She takes a random sample of 100 scores and finds M = 102. Hot_ in words:_ HA:_ in words:_ Draw curve & indicate critical values of z: Is this one-tailed or two-tailed? Test statistic: z = M - H SEM = 0/Vn OM Conclusion: I reject/do not reject the null hypothesis because my stat z = CV = Sentence in APA format: In 2018, 100 high school students from Kansas took the verbal SAT had a mean score of 510 and SD =70. Are these students significantly higher than the population of SAT verbal scores which had a mean of 500 (o unknown)? Test this hypothesis with a = .05 (be sure to state Ho and H;). Ho : in words:_ HA!_ in words:_ Draw curve & indicate critical values of t: Is this one-tailed or two-tailed? Test statistic= one-sample t of = n-1 100-1 = 99 Go to T-table: but use df=80 CV = 1.664 1) From raw data get SS, variance, est.SEM: s? = SS_or SS_ SM= V(s?) n-1 df 2) if sample s or SD given: est. SEM = SM = s /Vn 3) t = M-u SM Conclusion: I reject/do not reject the null hypothesis because my stat t = CV = Sentence in APA format