Question

英文统计题 急求答案！

QUESTION 21:
Suppose a normally distributed population has a mean and a standard deviation of . Give the z-scores corresponding to the raw scores of:
(a) x=950 (b) x=350
1. Interpret the z-scores.
2. Find the area under the normal curve between the mean and the z-score in (a).
3. Find the area under the normal curve between the mean and the z-score in (b).

Answer 1

问题21：
假设一个正态分布的母体具有均值_及标准偏差_。令z比分数与以下原始比分数相当：
(a) x=950 (b) x=350
1. 解析z比分数
2. 求(a)状况时在正态分布曲线下均值与z比分数之间的面积
3. 求(b)状况时在正态分布曲线下均值与z比分数之间的面积