# How do you calculate standard deviation of risk and return?

## How do you calculate standard deviation of risk and return?

To find standard deviation on a mutual fund, add up the rates of return for the period you want to measure and divide by the total number of rate data points to find the average return. Further, take each individual data point and subtract your average to find the difference between reality and the average.

## Does standard deviation measure total risk?

Beta coefficient is a measure of an investment's systematic risk while the standard deviation is a measure of an investment's total risk. ... Risk that results from company-specific factors is called unique risk while the risk that affects the whole market is called systematic risk.

## What is the acceptable standard deviation?

For an approximate answer, please estimate your coefficient of variation (CV=standard deviation / mean). As a rule of thumb, a CV >= 1 indicates a relatively high variation, while a CV < 1 can be considered low. ... A "good" SD depends if you expect your distribution to be centered or spread out around the mean.

## What is a 90% confidence interval?

Calculating the Confidence Interval
Confidence IntervalZ
90%1.

## What is the critical value for a 90 confidence interval?

Checking Out Statistical Confidence Interval Critical Values
Confidence Levelz*– value
80%1.

## How do you find the Z value?

The formula for calculating a z-score is is z = (x-μ)/σ, where x is the raw score, μ is the population mean, and σ is the population standard deviation. As the formula shows, the z-score is simply the raw score minus the population mean, divided by the population standard deviation. Figure 2.