某商場(chǎng)準(zhǔn)備在商場(chǎng)內(nèi)安裝充電式應(yīng)急照明燈,通過(guò)招標(biāo)收到3家照明燈生產(chǎn)商的投標(biāo)。該商場(chǎng)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(gè)進(jìn)行檢驗(yàn),測(cè)得各個(gè)樣品充電后可持續(xù)照明的時(shí)間長(zhǎng)度(小時(shí))數(shù)據(jù)如下:
要求:
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