14、An analyst determined that approximately 99 percent of the observations of daily sales for a company were within the interval from $230,000 to $480,000 and that daily sales for the company were normally distributed. The mean daily sales and standard deviation of daily sales, respectively, for the company were closest to: | Mean daily sales | Standard deviation of daily sales | A. | $351,450 | $41,667 | B. | $351,450 | $83,333 | C. | $355,000 | $41,667 | D. | $355,000 | $83,333 |
A. Answer A B. Answer B C. Answer C D. Answer D
[此贴子已经被作者于2008-11-7 16:47:30编辑过] | 
发表于 2008-5-17 18:19
| 
