The efficacy of insecticides is often measured by the does necessary to kill a certain percentage of insects. Suppose a certain dose of a new insecticide is supposed to kill 80% the insects that receive it. To test the claim, 25 insects are exposed to the insecticide. a.If the insecticide really kills 80% of the exposed insects, what is the probability that fewer then 15 die? 我是算出 0.0062 不知道对不对 b.If you observed such a result, what would you conclude about the new insecticide? Explain your logic. 没有给α, 不知道要如何下手. The 2112 members responding had a salary distribution with a 20th percentile of $35100 ; a median of $50000 ; and an 80th percentile of $73000. a.Use this information to determine the minimum sample size that could be used in next year to estimate the mean salary of the members to within $2000 with 98% confidence. b.Explain how you estimated the standard deviation required for the sample size calculation. c.List any assumptions you make. 感谢! -- 夫兵者不祥之器物或恶之故有道者不处君子居则贵左用兵则贵右兵者不祥之器非君子 之器不得已而用之恬淡为上胜而不美而美之者是乐杀人夫乐杀人者则不可得志於天下 矣吉事尚左凶事尚右偏将军居左上将军居右言以丧礼处之杀人之众以哀悲泣之战胜以 丧礼处之道常无名朴虽小天下莫能臣侯王若能守之万物将自宾天地相合以降甘露民莫 之令而自均始制有名名亦既有夫亦将知止知止可以不殆譬道之SciEdu.NCTU.edu.tw海