Using symbols state hypotheses for two-tailed test

Reference no: EM1321535

Q1) Researcher is investigating effectiveness of new study-skills training program for elementary school children. Sample of n = 25 third grade children is given standardized achievement test at end of year. For regular population of third-grade children, scores on test form normal distribution with mean of m = 150 and standard deviation s = 25. Mean for the sample is M = 158.

a) Recognize independent and dependent variable for study.

b) Suppose two-tailed test state null hypothesis in sentence which includes independent variable and the dependent variable.

c) Using symbols state hypotheses (H₀ and H₁) for two-tailed test.

d) Sketch suitable distribution and locate critical region for a = 0.05.

e) Compute test statistic (z-score) for the sample.

f) What decision must made about null hypothesis and what decision must be made about effect of program?

Reference no: EM1321535

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