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Q: When do you use beta and standard deviation?
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Difference between beta and standard deviation?

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What is standard deviation divided by AVERAGE net income?

beta


How is it possible to convert normal distributions to the standard normal distribution?

use this link http://www.ltcconline.net/greenl/Courses/201/probdist/zScore.htm Say you start with 1000 observations from a standard normal distribution. Then the mean is 0 and the standard deviation is 1, ignoring sample error. If you multiply every observation by Beta and add Alpha, then the new results will have a mean of Alpha and a standard deviation of Beta. Or, do the reverse. Start with a normal distribution with mean Alpha and standard deviation Beta. Subtract Alpha from all observations and divide by Beta and you wind up with the standard normal distribution.


When do you use the relative standard deviation instead of standard deviation?

Use %RSD when comparing the deviation for popolations with different means. Use SD to compare data with the same mean.


Why use standard deviation and not average deviation?

Because the average deviation will always be zero.


Why use the T score?

T-score is used when you don't have the population standard deviation and must use the sample standard deviation as a substitute.


Does standard deviation measure systematic or unsystematic risk?

Standard deviation is a measure of total risk, or both systematic and unsystematic risk. Unsystematic risk can be diversified away, systematic risk cannot and is measured as Beta.


How do you use standard deviation?

Standard deviation is a measure of how spread out a set of numbers are from each other. It has a variety of uses in statistics.


What are the assumptions of standard deviation?

The standard deviation is the standard deviation! Its calculation requires no assumption.


What does the sample standard deviation best estimate?

The standard deviation of the population. the standard deviation of the population.


Why does the effect-size calculation use standard deviation rather than standard error?

The goal is to disregard the influence of sample size. When calculating Cohen's d, we use the standard deviation in teh denominator, not the standard error.


How do you calculate sample standard deviation?

Here's how you do it in Excel: use the function =STDEV(<range with data>). That function calculates standard deviation for a sample.