Thursday

July 24, 2014

July 24, 2014

Posted by **April** on Sunday, January 24, 2010 at 7:37pm.

I got that variance-34.2, but I'm unsure. Any help? Thanks.

- math -
**Reiny**, Sunday, January 24, 2010 at 8:16pmlook at his page.

http://davidmlane.com/hyperstat/A16252.html

- Reiny -
**April**, Sunday, January 24, 2010 at 8:25pmI looked at that page and did my problem according to the example, but the answer I got wasn't even a choice. Can you help al ittle more please?

- math -
**Reiny**, Sunday, January 24, 2010 at 8:36pmdid you get a mean of 10.8 ?

My squared differences were:

96.04, 27.04,7.84,38.44,1.44

that sum/5 = 34.16 which is the variance^2

so the variance = √34.16 = 5.845

notice that there is difference in the calculation depending on whether you divide by N or N-1.

Your text or your course should tell you which method to use.

- math -
**April**, Sunday, January 24, 2010 at 8:54pmNo. I thought mean was adding up the numbers and then dividing by how many numbers.

So .51+.44+.04+.01=1 divided by 4=.25

- math -
**Reiny**, Sunday, January 24, 2010 at 9:51pm(1 + 16 + 8 + 17 + 12)/5 = 10.8

mmmmh?

where did you get your numbers from ????

**Related Questions**

reiny - How do I find a variance for a set of numbers {1,16,8,17,12} I got that ...

Statistics - Which of these statements is not true about the variance in a ...

math- Variance - What does it mean when it says Variance of Stride Length with ...

HELPP math - 13,14,29,26,41,53,60,7,89,14 Based on the numbers above what is the...

college math - 20. Calculate the range, variance, and standard deviation of the ...

ALGEBRA - Find the range and the variance (correct to one decimal place). 77, 92...

math - calculste the variance of this set of numbers 2, 2, o, 3, 1, 4, 1, 3, 0, ...

Statistics (random variable) - A contractor is interested in the total cost of a...

Math Statistics - In general, what is the relationship between the standard ...

analysis variance - which analysis of variance should be applied when an ...