Standard normal distrubition
A software house found that the project value received over the past year were approximately normally distributed, with a mean of $43,000 and a standard deviation of $8,500. Suppose the project value remains the same next year.
(a)What proportion of new projects would you expect to be $35,000 or less? (2 marks)
(b)What proportion of new projects would you expect to be between $30,000 and $45,000?
- 知足常樂Lv 76 年 前最佳解答