Wednesday

July 30, 2014

July 30, 2014

Posted by **David** on Saturday, November 30, 2013 at 7:44pm.

92.3 89.4 76.9 65.2. 49.1. 96 7. 69.5. 72.8. 77.5 52.8. 8.85. 79.2. 72.9. 68.7. 75.8

- elementary statistics -
**MathGuru**, Monday, December 2, 2013 at 5:42pmThere are different ways you can do this kind of problem, but the formula below might be one of the easier ways:

s/[1 + (1.645/√2n)]

..to..

s/[1 - (1.645/√2n)]

...where s = standard deviation, 1.645 represents the 90% confidence interval using a z-table, and n = sample size.

You will need to calculate standard deviation from the data given, then substitute the standard deviation and sample size into the formula.

After you finish the above calculations, square the standard deviation values to find the variance values.

I hope this will help get you started.

**Related Questions**

elementary statistics - A statistics professor is used to having a variance in ...

statistics anova - a professor is interested in whether there is a differnce in ...

Statistics - Exam Grades. A statistics professor is used to having a variance in...

business - Prepare a 700- to 1,050-word paper in which you describe the use of ...

Statistics - 3. A professor is interested in whether there is a difference in ...

m/c - Which of the following refers to when a researcher gathers data from a ...

statistics - a statistics professor plans classes so carefully that the lenghts ...

Statistics - A statistics professor plans her classes so carefully that the ...

Statistics-Confidence Interval - Can someone please help me on how to work this ...

Math/Statistics - A statistics teacher believes that the final exam grade for ...