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September 23, 2014

September 23, 2014

Posted by **Alia** on Friday, January 4, 2013 at 6:57pm.

Select one:

a. 3.00

b. 6.25

c. 2.50

d. 1.25

Please note that the answer for the above is stated as c.2.50. However, my answer comes to 1.89 which is not given as an option and I can't figure out where I'm going wrong so please can anyone help me with this problem.

Thanks.

- Statistics & Probability -
**drwls**, Saturday, January 5, 2013 at 3:22amYou are correct. I also get 1.89 for the standard deviation.

If the standard deviation were 2.50, only 67% of X numbers would be below 12.10

- Statistics & Probability -
**Alia**, Saturday, January 5, 2013 at 6:54amThank you!

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