Consider a population with a known standard deviation of 26.8. In order to compute an interval estimate of the population mean, a sample of 64 observations is drawn. Use Table 1.
a. Is the condition that X bar is normally distributed satisfied? Yes No b.Compute the margin of error at a 95% confidence level. (Round your intermediate calculations to 4 decimal places. Round "z" value and final answer to 2 decimal places.)Margin of error:
c. Compute the margin of error at a 95% confidence level based on a larger sample of 225 observations. (Round your intermediate calculations to 4 decimal places. Round "z" value and final answer to 2 decimal places.)
d. Which of the two margins of error will lead to a wider confidence interval?
95% confidence with n = 64.
95% confidence with n = 225.