- Tue Jun 01, 2010 5:22 am
- Forum: Statistics
- Topic: mean 12.2, standard dev 2.5: what prop. of pop. is under 10?
- Replies:
**1** - Views:
**5278**

A normal population has a mean of 12.2 and a standard deviation of 2.5. What proportion of the population is less than 10.0

- Tue Jun 01, 2010 5:19 am
- Forum: Statistics
- Topic: mean 80, standard dev 14: 80% of values above what value?
- Replies:
**1** - Views:
**4058**

A normal distribution has a mean of 80 and a standard deviation of 14. Determine the value above which 80 percent of the values will occur.