Two-tailed test for point effect

Reference no: EM13100336

Under what circumstances a 6 - point treatment effect can be very large, and in some circumstances it can be very small. Assume a sample of n = 16 individuals is selected from a population with a mean of µ = 70. A treatment is administered to the sample and, after treatment, the sample mean is found to be M = 76. Notice that the treatment appears to have increased scores by an average of 6 points.

a) If the population standard deviation is σ = 20 is the 6 point effect large enough to be statistically significant? Use the two - tailed test with α = .05

b) If the population standard deviation is σ = 8 is the 6-point effect large enough to be statistically significant? Use the two - tailed effect with α = .05

Reference no: EM13100336

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