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September 18, 2014

September 18, 2014

Posted by **Liz** on Sunday, March 31, 2013 at 6:25pm.

Based on the interquartile ranges of the two sets of data, which is a reasonable conclusion concerning heights of the players on the two teams?

Volley ball team:67,63,70,67,68,69.70,68,72,68

Dance team:62,67,59,63,67,60,66,60,66,63

A. there is a greater variability of heights for the middle 50% of the dance team than for the middle50% of the volleyball team members

B. There is a greater variability of heights for the middle 50% of the volleyball team than for the middle50% of the dance team members

c. The variability for the 50% was the same for both team members

D. the average height, in inches, was higher for the members of the dance than for the members of the volleyball team.

I had B. since 68 is the middle and the is 5 numbers before it to get to the lowest number,63, and 4 to get to the highest number,72.

In dance 63, 59 is the lowest nuber, being 4 away and the highest is 67, being 4 away., so volleyball team has more variability.

Is this correct. I don't know if I did this correctly, can you help me; thanks

- Math- Ms Sue can you help -
**bobpursley**, Sunday, March 31, 2013 at 6:49pmIs there any reason you did not compute the standard deviation for each set of data? Standard deviation indicates variability.

- Math- -
**Liz**, Sunday, March 31, 2013 at 6:59pmI didn't do the standard deviation for each one because I didn't know how, can you help?, if not do you have something ( a link to forward me to) so I can review standard deviations.

I do appreciate your help.

- Math- Ms Sue can you help -
**bobpursley**, Sunday, March 31, 2013 at 7:01pmDo you have a statistical calculator? http://easycalculation.com/statistics/standard-deviation.php

Your text will tell you how to do it manually, if you want to groan thru it, all students need to do that once.

- Math- Ms Sue can you help -
**Liz**, Sunday, March 31, 2013 at 7:31pmso the volleyball team had a standard deviation 2.39 and a mean of 68.2

( I messed up when giving you the numbers, there should have been a comma between 69 &70 not a period-giving 10 numbers)

The dance team I got 3.05 standard deviation and a mean of 63

So the should the answer be A.

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