The distribution of the numbers of hours that students at a certain college studied for final exams has a mean of 12 hours and a standard deviation of 3 hours.Which of the following numbers of hours are within 2 standard deviations of the mean of the

the distribution of practice the three properties of a normal distribution the Wishart distribution is a generalization to multiple dimensions of the chi-square distribution, 求问：explain the affect of distribution of ecosystems. the distribution of IQ in the popuation.是什么意思 The upper support of the distribution is b. the chain model of LNG distribution的英文翻译 distribution of the surplus in proportion to purchases什么意思 英译汉：The quice distribution …The quick distribution of virus caused great damage to the network system across the country. 帮我改下语法吧!5.Strengthen the reform of income distributionsystem.Insisted distribution according to work is dominant and a variety ofmodes of distribution coexist distribution system.Implement the principle ofproduction and distribution acc 英语翻译Also in this case the position of the beginning dry out changes with the distribution apparent volume of distribution是什么意思 apparent volume of distribution是什么意思 apparent volume of distribution是什么意思 Denote by k the 100(1-α)th percentile of the standard normal distribution.RT power distribution 是幂指数分布?since the power distribution of different types of coefficients may vary由于不同类型系数的power分布不同． Distribution how is the spatial distribution of light energy described?how is reflection from a surface characterized?