某商場準(zhǔn)備在商場內(nèi)安裝充電式應(yīng)急照明燈,通過招標(biāo)收到3家照明燈生產(chǎn)商的投標(biāo)。該商場從3家生產(chǎn)商提供的應(yīng)急照明燈樣品中各隨機(jī)抽取了5個進(jìn)行檢驗,測得各個樣品充電后可持續(xù)照明的時間長度(小時)數(shù)據(jù)如下:
要求:
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