問(wèn)答題

警方學(xué)員坐在一個(gè)黑暗的房間里,對(duì)著投影屏幕。十個(gè)不同的許可飛機(jī)被投影在屏幕上,一次一個(gè),每次5秒,兩次試驗(yàn)間隔15秒。在最后15秒的時(shí)間間隔里,打開(kāi)燈,要求警察學(xué)員以任意次序?qū)懴掠^察到的盡可能多的10個(gè)牌號(hào)。隨機(jī)抽取試驗(yàn)中的15名學(xué)員參加了為期一周的記憶訓(xùn)練課程。然后,對(duì)他們進(jìn)行重新測(cè)試,正確號(hào)碼牌的數(shù)量結(jié)果如下表所示。

試求識(shí)別號(hào)碼牌數(shù)差異均值的點(diǎn)估計(jì)。

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