The table shows the total annual precipitation for SD, California for several years. What is the mean annual precipitation to the nearest tenth of an inch? (Enter only the number.)
The right answer is 9.1
- This is the chart.-http://assets.openstudy.com/updates/attachments/51dae58fe4b0d9a104d95481-istinkatmath1-1373300232903-chart.png
2. What is the standard deviation rounded to the nearest tenth?
4.0
3. In what years was the precipitation more than one standard deviation from the mean?
This question is the only one I cannot figure out.
1995, 1998, and 2003
1999 and 2002
1995, 1998, and 2002

Question

The table shows the total annual precipitation for SD, California for several years. What is the mean annual precipitation to the nearest tenth of an inch? (Enter only the number.)
The right answer is 9.1
->> This is the chart.->http://assets.openstudy.com/updates/attachments/51dae58fe4b0d9a104d95481-istinkatmath1-1373300232903-chart.png
2. What is the standard deviation rounded to the nearest tenth?
4.0
3. In what years was the precipitation more than one standard deviation from the mean?
This question is the only one I cannot figure out.
1995, 1998, and 2003
1999 and 2002
1995, 1998, and 2002

anonymous · Answer

This is using Binomial Distribution.