英语的统计学问题,有关标准差、平均值
英语的统计学问题,有关标准差、平均值
A group of 13 students is studying in Istanbul,Turkey,for five weeks.As part of their study of the local
economy,they each purchased an Oriental rug and arranged for its shipment back to the United States.The
shipping time,in days,For each rug was
31 31 42 39 42 43 34
30 28 36 37 35 40
Estimate the percentage of days that are within two standard deviations of the Mean.Is it likely to take 2
months for a delivery?
Estimate the percentage of days that are within two standard deviations of the Mean.
请写出具体的计算步骤