麦当劳餐馆在某月内抽查50位顾客的消费额,求得每位顾客的平均消费为32元标准差为9.38元,是求在90%概率保证下,顾客平均消费的估计区间.
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![麦当劳餐馆在某月内抽查50位顾客的消费额,求得每位顾客的平均消费为32元标准差为9.38元,是求在90%概率保证下,顾客平均消费的估计区间.](/uploads/image/z/14606250-42-0.jpg?t=%E9%BA%A6%E5%BD%93%E5%8A%B3%E9%A4%90%E9%A6%86%E5%9C%A8%E6%9F%90%E6%9C%88%E5%86%85%E6%8A%BD%E6%9F%A550%E4%BD%8D%E9%A1%BE%E5%AE%A2%E7%9A%84%E6%B6%88%E8%B4%B9%E9%A2%9D%2C%E6%B1%82%E5%BE%97%E6%AF%8F%E4%BD%8D%E9%A1%BE%E5%AE%A2%E7%9A%84%E5%B9%B3%E5%9D%87%E6%B6%88%E8%B4%B9%E4%B8%BA32%E5%85%83%E6%A0%87%E5%87%86%E5%B7%AE%E4%B8%BA9.38%E5%85%83%2C%E6%98%AF%E6%B1%82%E5%9C%A890%25%E6%A6%82%E7%8E%87%E4%BF%9D%E8%AF%81%E4%B8%8B%2C%E9%A1%BE%E5%AE%A2%E5%B9%B3%E5%9D%87%E6%B6%88%E8%B4%B9%E7%9A%84%E4%BC%B0%E8%AE%A1%E5%8C%BA%E9%97%B4.)
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