Posted by **chai** on Sunday, February 6, 2011 at 6:49am.

The IQ of 100 college students in XYZ univ are found to be normally distributed where mean is 105 and standard deviation is 8. If the student IQ score is 90, what is the probability that another student randomly slected has an IQ score of below 90.

- statistics -
**PsyDAG**, Sunday, February 6, 2011 at 9:08am
Z = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the probability related to that Z score.

- statistics -
**Anonymous**, Sunday, February 6, 2011 at 9:47pm
3-100

Matthews, Young and Associates, a Chapel Hill consulting firm, has these records indicating the number of days each of its ten staff consultants billed last year:

212 320 230 210 229 231 219 221 222

a)Without computing the value of any of these measures, which of them would you guess would give you more information about this distribution: range or standard deviation?

b) Considering the difficulty and time of computing each of the measures you reviewed in part (c), which one would you suggest is better?

(d) What will cause you to change your mind about your choice?

## Answer This Question

## Related Questions

- statistics - Can you please tell me how to solve for the following? Pedro took ...
- College of education ekiadolor Benin - The scores of an achievement test given ...
- statistics - Suppose that the test scores for a college entrance exam are ...
- statistics - Reading placement scores for a particular college are normally ...
- statistics - SAT scores are normally distributed. The SAT in English has a mean ...
- statisitcs - The combined math and verbal scores for students taking a national...
- statistics probability - Alice earned a score of 940 on an IQ test.The mean test...
- probability - The National Center for Educational Statistics reported that in ...
- social science statistics - a professor was curious to whether the students in a...
- Math - The combined math and verbal scores for students taking a national ...

More Related Questions