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Illustrate all the calculation
1.To test effectiveness of treatment, sample of n = 25 people is selected from normal population with mean of µ = 60. After treatment is administered to individuals in sample, sample mean is found to be M = 55.
a. If population standard deviation is σ = 10, can you conclude that treatment has significant effect? Use two-tailed with α = .05.
b. If population standard deviation is σ = 20, can you conclude that treatment has significant effect? Use two-tailed test with α = .05.
c. Calculate Cohen's d measure effect size for both tests (σ = 20 and σ = 10).
d. Explain how sample size affect outcome of hypothesis test. How does sample size affect measures of effect size?
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The correlation between the returns on Ceramics Craftsman, Inc., and the returns on the S&P 500 is 0.675. The variance of the returns on Ceramics Craftsman, Inc., is 0.004225, and the variance of the returns on the S&P 500 is 0.001467.
First, write down three social problems (e.g., drug abuse, gang membership, bullying, domestic violence, child abuse, etc) that we might attempt to predict using logistical regression.
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