(1) 此組樣本的變異數大於 18.69 公克的機率 =_____________；

題組內容

8. (10%)元宇宙公司所生產的後台小型伺服器鏡頭，其重量為一常態分配，平均數為147.8公克，標準差為3.51公克，現抽出25個後台小型伺服器鏡頭，其中X和S²代表這組樣本的平均重量及其重量的變異數，則：

2. Assuming a competitive market in the U.S., together with a supply function: $ q{s} = 400p - 400 $ and a demand function: $ q{d} = 2400 - 400p $. When the equilibrium price and quantity are reached, what are equilibrium price and quantity? (10%). Now due to Trump's reciprocal tariff policy, the authorities impose a $4 per-unit tax to be collected from sellers. We denote $ P{c} $ as the price paid by consumers after imposed tax and $ P{s} $ as the price received by producers after tax. Please solve the after-tax equilibrium quantity ($ q^{} $) and equilibrium prices for both consumers $ P{c}^{} $ and sellers $ P{s}^{*} $. (15%)

題組內容

(1) 此組樣本的變異數大於 18.69 公克的機率 =_____________；

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