1. The following sample of n = 25 scores was obtained from a population with = 20, and a treatment is administered to each

1.  The following sample of n = 25 scores was obtained from a population with μ = 20, and a treatment is administered to each individual in the sample.  After treatment, the sample mean is found to be M = 22.2 with SS = 384.a.   How much difference is there between the mean for treated sample and the mean for the original population?  (Note: In a hypothesis test, this value forms the numerator of the t-statistic).b. Find the standard error for the M (Note: In a hypothesis test, this value is the denominator of the t-statistic).c. Based on the sample data, does the treatment have a significant effect? (Note: Do the 4 steps of the hypothesis test using a two-tailed test with α = .05.