Using a random sample from a population, Hazel cannot decide if she wants to construct a 92 percent confidence interval for the population mean or a 98 percent confidence interval for the population mean. What is the difference between the two confidence intervals? a The size of the sample determines which interval is wider. b An unbiased sample determines which interval is wider. c Which interval is wider will depend on whether a z-statistic or a t-statistic is used. d The 92 percent confidence interval will be wider than the 98 percent confidence interval. e The 92 percent confidence interval will not be as wide as the 98 percent confidence interval.