From a population that is normally distributed, a sample of 25 elements is selected and the standard deviation of the sample is computed. For the interval estimation of mu \muμ, the proper distribution to use is the

A. Z distribution with sample size of 25
B. t distribution with 25 degrees of freedom
C. t distribution with 26 degrees of freedom
D. t distribution with 24 degrees of freedom

Tom is the deli manager at a grocery store. he needs to schedule employee to staff the deli department for no more that 260 person-hours per week. tom has one part-time employee who works 20 person-hours per week. each full-time employee works 40 person-hours per week. write and inequality to determine n, the number of full-time employees tom may schedule, so that his employees work on more than 260 person-hours per week. graph the solution set to this inequality.