SOLUTION: Hi!!! guys I have a couple of questions if you do not mine answer. I understand that central tendency use frequently the mean of population to measured, so if I want to analyze

Question 78014: Hi!!! guys I have a couple of questions if you do not mine answer.
I understand that central tendency use frequently the mean of population to measured, so if I want to analyze data always came from population. For example if I am interested in the average high temperature in July. Now, the mean would be the total of these temperatures divide by 31.
Suppose you calculate a mean of a population and you want to know how representative that mean is of a random data point in that population. In other words, is the data bunched tightly around the mean, or is it more loosely distributed over the possible range of values? An example would be high temperatures in July versus high temperatures in April or October. In general, the highs in April and October will vary more widely from the means in those months than the highs in July. It takes not only the mean to adequately describe a population, but there must be some way to measure the dispersion, or distribution, of the data around the mean.
1. What is distribution of a data population?
2. I need to find the statistic that measures the width of dispersion ("looseness" or "tightness") of the population data about its mean. I need tow examples or one of the type of situation where this statistic might be important to making good decisions about the population under study to explain my friend that she don’t have internet access.

Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
I'm not a statistician so I'm giving you this reference I found that I think will help a lot

www.robertniles.com/stats/stdev.shtml
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