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- If you answer is +, input as "+/-" (+1.395 would be entered as +/-1.395) Rounding rules: Z-value: Round nearest hundredth. (1.389 would be entered as 1.39) t-value: Round nearest thousandth. (2.5678 would be entered as 2.568) x2 value: Round nearest thousandth. (2.5678 would be entered as 2.568) p-value: Round nearest ten-thousandth. (0.358789 would be entered as 0.35879) D Question 1 7 pts At a certain university, the average cost of books was $400 per student last semester. This semester a sample of 55 students revealed an average cost of books of $435 per student and a standard deviation of $75. The Dean of Students believes that the costs are greater this semester. Test by using the level of significance=0.01 (a) What is the parameter? . (input as "mean", "standard deviation", "variance" or "proportion") (b) Determine if the alternative hypothesis is "right", "left" or "two-tailed" test. (input as "right", "left" or "two-tailed") (c) Find the test statistic. (d) Find the p-value. (e) Find the critical value. (f) State conclusion.: There is (input as "sufficient" or "insufficient") to (input as "conclude" or "reject") to conclude that the Dean of students believes that the costs are greater this semester