The University of Miami bookstore stocks textbooks in preparation for sales each semester. It normally relies on departmental forecasts and preregistration records to determine how many copies of a text are needed. Preregistration shows 95 operations management students​ enrolled, but bookstore manager Vaidy Jayaraman has second​ thoughts, based on his intuition and some historical evidence. Vaidy believes that the distribution of sales may range from 75 to 95 ​units, according to the following probability​ model: Demand 75 80 85 90 95 Probability 0.05 0.25 0.20 0.15 0.35 This textbook costs the bookstore $ 82 and sells for $ 117 . Any unsold copies can be returned to the​ publisher, less a restocking fee and​ shipping, for a net refund of $ 30 . ​a) Based on the given​ information, Vaidy's conditional profits table for the bookstore​ is: Demand 75 80 85 90 95 Stock pequals 0.05 pequals 0.25 pequals 0.20 pequals 0.15 pequals 0.35 75 nothing nothing nothing nothing nothing

Listed below are time intervals (min) between eruptions of a geyser. assume that the "recent" times are within the past few years, the "past" times are from around 20 years ago, and that the two samples are independent simple random samples selected from normally distributed populations. do not assume that the population standard deviations are equal. does it appear that the mean time interval has changed? is the conclusion affected by whether the significance level is 0.10 or 0.01? recent 78 90 90 79 57 101 62 87 71 87 81 84 57 80 74 103 62 past 88 89 93 94 65 85 85 92 87 91 89 91 follow the steps of hypothesis testing, including identifying the alternative and null hypothesis, calculating the test statistic, finding the p-value, and making a conclusions about the null hypothesis and a final conclusion that addresses the original claim. use a significance level of 0.10. is the conclusion affected by whether the significance level is 0.10 or 0.01? answer choices below: a) yes, the conclusion is affected by the significance level because h0 is rejected when the significance level is 0.01 but is not rejected when the significance level is 0.10. b) no, the conclusion is not affected by the significance level because h0 is not rejected regardless of whether a significance level of 0.10 or 0.01 is used. c) yes, the conclusion is affected by the significance level because h0 is rejected when the significance level is 0.10 but is not rejected when the significance level is 0.01. d) no, the conclusion is not affected by the significance level because h0 is rejected regardless of whether a significance level of 0.10 or 0.01 is used.