Explain what is measured by the sample standard a sta with S а. deviation. b. Compute the estimated standard error for the sample mean and explain what is measured by the а. Но for ро fo b. H standard error 3. Find the estimated standard error for the sample mean for each of the following samples. a. n 9 with SS = 1152 b. n= 16 with SS= c. n = 25 with SS = 600 b 540 с. 4. Explain why t distributions tend to be flatter and more spread out than the normal distribution. 10. Ar 5 Find the t values that form the boundaries of the criti- cal region for a two-tailed test with a = .05 for each of the following sample sizes: = 4 0R b. n = 15 0 fro ad tre Wi а. п — a. DIC9R с. п %3D 24 6. Find the t value that forms the boundary of the critical region in the right-hand tail for a one-tailed test with a = .01 for each of the following sample sizes. TE a. п 3D 10 b. n 20 c. n 30 1. The following sample of n = 4 scores was obtained from a population with unknown parameters. Scores: 2, 2, 6, 2 11. a. Compute the sample mean and standard deviation. (Note that these are descriptive values that sum- marize the sample data.) D. Compute the estimated standard error for M. forantial value that describes