solve them all

Suppose, in Exercise 1D_12, we oonclude that Edit-ii of the voters favor the gasoline sales tax if more than 21 :1 but fewer titan 255 voters in our sample favor it. Show that this new critical region results in a smaller value for d at the expense of increasing ,8. 10.12 Arandom sample of mo voters in a certain city are asked iftheyr favor an additional 4% gasoline sales tax to provide badly needed revenues for street repairs. if more than 220 but fewer than 26d favor the sales tax, we shall conclude that EDEN: of the voters are for it. {a} Find the probability of committing a type I error if sorts of the voters favorthe increased tax. {b} What is the probability of committing a type II error using this test procedure if actually only 48% of the voters are in favor ofthe additional gasoline tax? \fA softdnnlt machine at a steal: ho use is regulated so that the amount of drinlt dispensed is approximately normally disb'ibuted with a mean of zoo milliliters and a standard deviation of 15 milliliters. The machine is checked penodically by taking a sample of 9 drinlts and computing the average content. If 5?; falls in the intenial 191