The director of a customer service center wants to estimate the mean number of customer calls the center handles each day, so he randomly samples 48 different days and records the number of calls. To create a 90% confidence interval for the true mean number of calls, the correct value of t* to be used is Using Table C to find t*, the exact degrees of freedom you need are not given, so use the value for the next smallest degrees of freedom listed (always use a smaller degrees of freedom to be conservative). Enter your answer to three decimal places. Your answer: 1.833 X