新GRE数学题~OG上的 不懂 求解A list of numbers has a mean of 8 and a standard deviation of 2.5. If x is a number in the list that is 2 standard deviations above the mean, what is the value of x? Answer is 13麻烦用中文解释一下 OG上的英文解释看的不是很清楚~~
2020-05-31
新GRE数学题~OG上的 不懂 求解
A list of numbers has a mean of 8 and a standard deviation of 2.5. If x is a number in the list that is 2 standard deviations above the mean, what is the value of x? Answer is 13
麻烦用中文解释一下 OG上的英文解释看的不是很清楚~~
优质解答
按照答案的理解应该是：x是两倍的standard deviation 因此比8大5应该是13
按照答案的理解应该是：x是两倍的standard deviation 因此比8大5应该是13