Staci is attending a music festival. the tickets at the festival cost $87.96. staci plans to purchase $30 t-shirts from the event for close friends. she is taking $200 to the festival. what is the maximum number of t-shirts stacy can purchase

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.