數學與統計 大學 1年以上以前

不好意思可以問一下！這題有沒有會嗎！謝謝🙏

19. 汽車維修花費 汽車維修花費不斷上升,2015 平均維修花費為 $367 (U.S. News & “也是或World Report website)。假定汽車維修花費是常態分配,標準差為 $88。回答以下關 於汽車維修費的問題。 a. 維修花費超過 $450 的機率是多少? b. 維修花費低於 $250 的機率是多少? k c. 維修花費介於$250到$450 的機率是多少? d. 如果你的汽車維修是收費比較低的5%,你必須支出多少錢?

數學與統計 大學 2年以上以前

求詳解🙏🙏🙏

(1 point) Consider the demand for tickets to see a specific hockey team play. The price of the ticket can be related to the quantity demanded (q) by the function: p=114 0.01q. When the arena is not close to full capacity the total cost can be expressed by the function: Cost = 63q + 50,000. Find marginal revenue (MR) as a function of quantity demanded. MR = Let p* and q* be the price and quantity demanded where profit is maximized. * q* = || The hockey players union has negotiated a deal requiring the team owner to pay an extra $10,000 a year in salaries to the players. What should the new ticket price ( P₁) be to ensure that profit is maximized. P1 =

數學與統計 大學 約5年以前

#基礎統計 A population has μ=40 and σ=8.If each score is divided by 2,the new standard deviation will be ____? 答案是4 求計算過程跟詳解！