You may need to use the appropriate appendix table or technology to answer this question. A simple random sample of 60 items resulted in a sample mean of 70. The population standard deviation is 0' = 15. (a) Compute the 95% condenoe interval for the population mean. (Round your answers to two decimal places.) |:| to E (h) Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean. (Round your answers to two decimal places.) :lto: (c) What is the effect of a larger sample size on the interval estimate? 0 A larger sample size does not change the margin of error. 0 A larger sample size provides a smaller margin of error. 0 A larger sample size provides a larger margin of error