The residence of town X participated in a survey to study the number of hours per week each resident spent watching TV.T
The residence of town X participated in a survey to study the number of hours per week each resident spent watching TV.The distribution of the results of the survey had a mean of 21 hours and a standard deviation of hours.The number of hours that pat,a resident of town X watched TV last week was between 1 and 2 standard deviations below the mean.Which of the following could be the number of hours that pat watched TV last week?30/B,20/C,18/D,12/E,6
請算出答案和過程說明思維路線.
在下十分感謝.
請算出答案和過程說明思維路線.
在下十分感謝.
英語人氣：130 ℃時間：2020-05-19 03:50:46
優(yōu)質(zhì)解答
你題目漏打數(shù)字了.The distribution of the results of the survey had a mean of 21 hours and a standard deviation of____ hours.我百度了一下,這里的數(shù)字應該是6.建議你復習一下均值mean和標準差standard deviat...
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