2. 外语
  3. A list of numbers has a mean of 8 and a standard deviation of 2.If x is a number in the list that is 2 standard deviations above

A list of numbers has a mean of 8 and a standard deviation of 2.If x is a number in the list that is 2 standard deviations above

admin2014-08-12  59
问题 A list of numbers has a mean of 8 and a standard deviation of 2.If x is a number in the list that is 2 standard deviations above the mean, what is the value of x ? x=______
选项
答案13
解析 You are given that x is 2 standard deviations above the mean, 8. Because the standard deviation of the numbers in the list is 2.5, it follows that x is(2)(2.5), or 5 units above the mean 8. Therefore, x = 8 + 5 = 13, and the correct answer is 13.
转载请注明原文地址:https://www.kaotiyun.com/show/a8kO777K
本试题收录于： GRE QUANTITATIVE题库GRE分类
0

GRE QUANTITATIVE

GRE

相关试题推荐
随机试题
最新回复(0)