enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Standard Deviation and Variance - Math is Fun

   www.mathsisfun.com/data/standard-deviation

   The Standard Deviation is a measure of how spread out numbers are. Its symbol is σ (the greek letter sigma) The formula is easy: it is the square root of the Variance.

3. Standard Deviation Formulas - Math is Fun

   www.mathsisfun.com/data/standard-deviation-formulas

   Work out the Standard Deviation. Step 1. Work out the mean. In the formula above μ (the greek letter "mu") is the mean of all our values ... Example: 9, 2, 5, 4, 12, 7, 8, 11, 9, 3, 7, 4, 12, 5, 4, 10, 9, 6, 9, 4. The mean is: 9+2+5+4+12+7+8+11+9+3+7+4+12+5+4+10+9+6+9+4 20. = 140 20 = 7.

4. Random Variables - Mean, Variance, Standard Deviation - Math is...

   www.mathsisfun.com/data/random-variables-mean-variance.html

   Random Variables: Mean, Variance and. Standard Deviation. A Random Variable is a set of possible values from a random experiment. Example: Tossing a coin: we could get Heads or Tails. Let's give them the values Heads=0 and Tails=1 and we have a Random Variable "X": So:

5. Standard Deviation Calculator - Math is Fun

   www.mathsisfun.com/data/standard-deviation-calculator.html

   Standard Deviation Mean Accuracy and Precision Probability and Statistics. Here are the step-by-step calculations to work out the Standard Deviation (see below for formulas). Enter your numbers below, the answer is calculated live.

6. Standard Deviation Definition (Illustrated Mathematics...

   www.mathsisfun.com/definitions/standard-deviation.html

   Illustrated definition of Standard Deviation: A measure of how spread out numbers are. It is the square root of the Variance, and the Variance is the average...

7. Variance Definition (Illustrated Mathematics Dictionary) - Math...

   www.mathsisfun.com/definitions/variance.html

   Standard Deviation and Variance. Search Index About Contact Cite This Page Privacy. Illustrated definition of Variance: A measure of how spread out numbers are. It is the average of the squared differences...

8. Normal Distribution - Math is Fun

   www.mathsisfun.com/data/standard-normal-distribution

   Here is the Standard Normal Distribution with percentages for every half of a standard deviation, and cumulative percentages: Example: Your score in a recent test was 0.5 standard deviations above the average, how many people scored lower than you did?

9. Covariance - Math is Fun

   www.mathsisfun.com/data/covariance.html

   The Calculations. Imagine we have pairs of values (x,y), our first step is to calculate means: Find the mean of the x values. Find the mean of the y values. Then for each pair of values: subtract the mean of x from the x value. subtract the mean of y from the y value. multiply those together.

10. Deviation Definition (Illustrated Mathematics Dictionary) - Math...

    www.mathsisfun.com/definitions/deviation.html

    In general: how far from the normal. In statistics: the difference between a single value and the mean of all values in a set. Here we see some deviations: Standard Deviation and Variance.

11. The Binomial Distribution - Math is Fun

    www.mathsisfun.com/data/binomial-distribution.html

    The formula for Variance is: Variance: σ 2 = np(1-p) And Standard Deviation is the square root of variance: σ = √(np(1-p))