Standard Deviation

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Standard Deviation
Message posted by Fee (via 65.198.98.16) on June 27, 2001 at 10:58 AM (ET)

5 6 8 10 5 7 8
What is the mean deviation?
What is the variance?
What is the standard deviation?

READERS RESPOND:
(In chronological order. Most recent at the bottom.)

Re: Standard Deviation
Message posted by JG (via 128.8.23.164) on June 27, 2001 at 2:31 PM (ET)

1. mean dev. 1.43
2. pop. var. 2.86 and
sample var. is 3.33
3. pop. SD is 1.69 and
sample SD is 1.83

Re: Standard Deviation
Message posted by John (via 64.12.106.48) on July 8, 2001 at 12:00 PM (ET)

I apologize, my response is meant to be a question about
a stats problem. If it is possible could answer be provided with hints at showing how ptoblem was solved. My STATS problem is about PROBABILITY involving
mean and standard deviation.
The question begins:

Suppose you have a normal distribution of I.Q scores with a mean of 100 and a standard deviation of 15. If you were to randomly select 1 score from this distribution, the probability that you would draw:

a) a score less than 100
b) a score greater than 100
c) a score greater than 115

Thank you for any help you can provide. PLEASE HEEELP!!!

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