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A Little Help With Standard Deviation - Please  
User currently offlineVafi88 From United States of America, joined Apr 2001, 3116 posts, RR: 17
Posted (10 years 4 months 4 weeks 1 day 23 hours ago) and read 1565 times:

Hey guys. I've been procrastinating a little bit, and with the test tomorrow, I'm having to write out the whole equation (which takes about 10 minutes and is about 3 miles long). I need to know how to plug it into my TI-83 so I can actually do all of the problems on my test tomorrow. I know how to get to the standard deviation. I get to:

2nd - Stat, then scroll to MATH, and then go down to StdDev(


I don't know what to plug into the parenthasies from StdDEV(

If any of you can help, it'd greatly be appreciated.



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4 replies: All unread, jump to last
 
User currently offlineJhooper From United States of America, joined Dec 2001, 6202 posts, RR: 12
Reply 1, posted (10 years 4 months 4 weeks 1 day 20 hours ago) and read 1547 times:

Well, I can't remember how to work the TI-83, but if all else fails, Standard Deviation isn't all that hard to do on pencil and paper, assuming you don't have lots of weird numbers  Big grin


Last year 1,944 New Yorkers saw something and said something.
User currently offline7574EVER From United States of America, joined Jan 2004, 478 posts, RR: 5
Reply 2, posted (10 years 4 months 4 weeks 1 day 20 hours ago) and read 1545 times:

Here's the way my professor taught us to do it. Remember the acronym..

The first letter of each word is the next step that needs to be done.

1.)Mean - figure out the mean (average) of all the numbers being used
2.)Dogs - figure out the deviation of all the numbers being used
3.)Send - square each of the deviations
4.)Meannies - figure out the mean of all the new numbers from step three.
5.)Running- then get the square root of the answer to step four.

After step five you should have the standard deviation.

I know you wanted to know how to put in into the TI-83, but since I can't help you there hopfully this can make it easier if you end up doing it on paper



Right rudder....Right rudder...Come on, more right rudder....Right rudder......Aw forget it, I quit!!
User currently offlineL-188 From United States of America, joined Jul 1999, 29791 posts, RR: 58
Reply 3, posted (10 years 4 months 4 weeks 1 day 20 hours ago) and read 1543 times:

Sorry can't help.

My graphing calculator is a Casio.



OBAMA-WORST PRESIDENT EVER....Even SKOORB would be better.
User currently offlineTYSGoVols From United States of America, joined Jan 2004, 634 posts, RR: 16
Reply 4, posted (10 years 4 months 4 weeks 1 day 6 hours ago) and read 1524 times:

If you can figure out teh variance then SD is not that hard

V squared = SD

SD suqare rooted = V

Not sure of any huge formulas though.

<>< Garen



Rocky Top You'll Always be home sweet home to me, Good ole' Rocky Top WOOOOO
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