Friday

December 19, 2014

December 19, 2014

Posted by **Byron** on Wednesday, January 30, 2008 at 6:16pm.

regular excersize scores= 1,3,4,3,5,2,3,4

no regular excersize scores=5,4,6,3,5,7,6,6

a)calculate the mean and the standard deviation for each group of score.

b)based on the statistics part, does there appear to be a difference between two groups?

----

my numbers look off. please help? thank you.

- statistics -
**Damon**, Wednesday, January 30, 2008 at 7:36pmGroup 1

mean = (1/8)* sum of your numbers, Call each Xi so (1/8)sum of Xi from i = 1 to 8

sigma^2 = (1/7)[ sum of (Xi-mean)^2] from i = 1 to 8

find sigma^2 and take the square root to find sigma

Do the same for group 2

See if the two means + or - their sigmas overlap significantly. If so, then you probably can not say much about how important exercise is to depression.

**Answer this Question**

**Related Questions**

statistics - What is your conclusion based on the following data? A survey was ...

Fitness & Nutrition - 16. How does regular exercise help to reduce the effects ...

statistics - how could you reword these research hypoteses to null hypoteses? a...

statistics - how can you reword these research hypotheses to null hypotheses: a...

Math/statistics - Thirty five percent of adult americans are regular voters. A ...

statistics - In an extensive study involving thousands of British children, ...

Statisics - 35%of adult Americans are regular voters. A random sample of 250 ...

health - Regular physical activity appears to reduce symptoms of ________ for ...

health - What percentage of adults older than 65 in the U.S. have experienced ...

health - Question 11 of 20 5.0 Points Regular physical activity appears to ...