Janelle Hutchison

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Making Frequency Distributions and Histograms by Hand

Generally, statisticians (and any sane person) will use some kind of statistical program like R or minitab to make their statistical graphs. However, …

Data Science

1.3.6.6.19. Poisson Distribution

The Poisson distribution is used to model the number of events occurring within a given time interval.<p>The formula for the Poisson probability mass …

How to Find the Mean, Variance, and Standard Deviation of a Binomial Distribution

• Education<br>• Math<br>• Statistics<br>• How to Find the Mean, Variance, and Standard Deviation of a Binomial Distribution<p>Because the binomial distribution is so …

Probability

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Poisson or Binomial distribution?

A typist makes on average 2 mistakes per page. What is the probability of a particular page having no errors on it?<p>A computer crashes once every 2 …

The Binomial distribution | S-cool, the revision website

Suppose that an experiment consists of <b>n identical</b> and <b>independent</b> trials. For example flipping a coin over and over again <b>n</b> times. For each trial there …

The Binomial Distribution

<b>For large values of n, the distributions of the count X and the sample proportion are approximately normal. This result follows from the Central</b> …

Factorials, Combinations and Permutations Calculators

4! = 4 × 3 × 2 × 1 = 24<p>10! = 10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1 = 3,628,800<p>3! = 3 × 2 × 1 = 6<p>As you can see, 10!, <i>pronounced 10 factorial</i>, is a …

Mathematics

Probability For Dummies Cheat Sheet - dummies

Successfully working your way through probability problems means understanding some basic rules of probability along with discrete and continuous …

Data Science

Mathematics & Statistics

Welcome to the Department of Mathematics and Statistics<p>Mathematics and statistics are found in almost every sector of work, academia, and everyday …

Mathematics

StatTrek

Probability Distributions: Discrete vs. Continuous<p>All probability distributions can be classified as discrete probability distributions or as …

Data Science

Addition Rules for Probability

Experiment: A single 6-sided die is rolled. What is the probability of rolling a 2 or a 5?<p>Possibilities:<p>1. The number rolled can be a 2.<p>2. The number …

Mathematics

Multiplication Rule

this page updated 19-jul-17<br>Mathwords: Terms and Formulas from Algebra I to Calculus<br>written, illustrated, and webmastered by Bruce Simmons<br>Copyright © …

Algebra

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ISPs

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ISPs

Conditional Probability

<i>How to handle Dependent Events</i><p>Life is full of random events! You need to get a "feel" for them to be a smart and successful person.<p>Independent …

Mathematics

Conditional Probability

Problem: A math teacher gave her class two tests. 25% of the class passed both tests and 42% of the class passed the first test. What percent of …

Middle School

Probability

Problem: A spinner has 4 equal sectors colored yellow, blue, green and red. What are the chances of landing on blue after spinning the spinner? What …

Probability

<i>How likely something is to happen.</i><p>Many events can't be predicted with total certainty. The best we can say is how <b>likely</b> they are to happen, using the …

Mathematics

Standard Deviation and Variance

<i>Deviation just means how far from the normal</i><p>Standard Deviation<p>The Standard Deviation is a measure of how spread out numbers are.<p>Its symbol is <b>σ</b> (the …

Mathematics

Measures of Central Tendency and Dispersion

Roughly the "average" amount of deviation in a distribution<p>Actually the square root of the average sum of squares.<p>denoted as <i>s</i> (for sample data) or σ …

Population

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ISPs

The Effects of Outliers

The Effects of Outliers (Jump to: Lecture | Video )<p>Outlier<p>An outlier is a value that is very different from the other data in your data set. This can …

Data Science

Outlier

An outlier is an observation that lies outside the overall pattern of a distribution (Moore and McCabe 1999). Usually, the presence of an outlier …

Data Science