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concepts. This statistics glossary includes definitions of all technical terms used ... 2 +10 2014 jun 02 linear regression slope Regression Slope : Confidence Interval - Stat Trek This lesson describes how to construct a confidence interval around the slope of
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on Stat ... 2 +1 2014 may 15 telephone de biais Survey Bias - Stat Trek Describes two sources of bias in survey sampling: unrepresentative samples and
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Key points are illustrated by a sample problem with solution. 3 +1 2014 may 31 rank of a matrix Matrix Rank - Stat Trek This lesson defines matrix rank and shows how to find the rank of a matrix .
Includes problems with solutions to illustrate key points. 3 +8 2014 may 24 standard error Standard Error - Stat Trek The standard error is an estimate of the standard deviation of a statistic. This
lesson shows how to compute the standard error , based on sample data. 3 ~ 2014 may 13 errore standard b1 italiano Linear Regression - Stat Trek For each value of X, the probability distribution of Y has the same standard
deviation σ. .... The standard error about the regression line (often denoted by SE
) is a ... 3 +10 2014 apr 24 bayes theorem examples Bayes ' Theorem - Stat Trek Bayes ' theorem (also known as Bayes' rule) is a useful tool for calculating ... This
section presents an example that demonstrates how Bayes ' theorem can be ... 3 +2 2014 apr 18 number sequence generator Random Number Generator - Stat Trek Use the Random Number Generator to create a list of random numbers , ...
numbers or repeats a particular sequence of random numbers . 3 +9 2014 apr 09 chi square test example Chi - Square Test of Independence - Stat Trek This lesson describes when and how to conduct a chi - square test of
independence. Key points are illustrated by a sample problem with solution. 3 ~ 2014 apr 08 random number generator range Use the Random Number Generator to create a list of random ... Numbers were
randomly selected from within the range of 0 to 99999. 3 +6 2014 apr 04 randomly generated numbers Use the Random Number Generator to create a list of random numbers , based
on your specifications. The numbers you generate appear in the ... 3 +5 2014 mar 29 random sample size Sample Size Calculation: Simple Random Sample - Stat Trek Sample size calculation with simple random sampling. How to find smallest
sample size that provides desired precision. Sample problem illustrates key
points. 4 ~ 2014 jul 02 negative binomial distribution Negative Binomial Distribution - Stat Trek In this lesson, we cover the negative binomial distribution and the geometric
distribution. As we will see, the geometric distribution is a special case of the ... 4 +9 2014 may 26 confidence interval Confidence Interval - Stat Trek This lesson explains what a confidence interval is and explains how to construct
and interpret confidence intervals . Includes sample problem with solution. 4 +33 2014 may 21 helpful internet statistics Useful Statistics Resources - Stat Trek Useful Statistics Resources On the Web . Sadly, our visitors ... 4 +49 2014 may 20 the difference in Difference in Means - Stat Trek How to construct a confidence interval for the difference between two sample
means. Step-by-step instructions, including two sample problems with solutions. 4 -1 2014 may 17 defination one sample t test one - sample t - test : Definition - Stat Trek Definition of one - sample t - test , from the Stat Trek dictionary of statistical terms
and concepts. This statistics glossary includes definitions of all technical terms ... 4 +26 2014 may 06 margin of error Margin of Error - Stat Trek In a confidence interval, the range of values above and below the sample statistic
is called the margin of error . For example, suppose we wanted to know the ... 4 +2 2014 may 05 unique number generator Random Number Generator creates random number tables. Up to 1000 ... Each
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and disproportionate sampling. Lists pros and cons versus simple random ... 4 +1 2014 apr 06 help with probability problems Probability Calculator - Stat Trek The probability of winning the 100-yard dash is 0.25, and 4 +2 2014 mar 31 statistics designs of experiments Experimental Design - Stat Trek Introduces experimental design – what it is and why it is useful in research.
Describes three common ... Experimental design in statistics : Video lesson. The
term ... 4 +3 2014 mar 24 what is an experiment Experiment - Stat Trek In an experiment , a researcher manipulates one or more variables, while holding
all other variables constant. By noting how the manipulated variables affect a ... 5 +4 2014 may 20 random number picker Random Number Generator creates random number tables. Up to 1000 numbers
per table. With or without duplicates. Each number within a ... 5 +2 2014 may 18 types of matrices Matrix Types - Stat Trek This lesson defines various kinds of matrices : vector, row vector, column vector,
square matrix, symmetric matrix, diagonal matrix, and scalar matrix. 5 +7 2014 may 17 hypothesis testing Hypothesis Tests - Stat Trek This assumption may or may not be true. Hypothesis testing refers to the formal
procedures used by statisticians to accept or reject statistical hypotheses. 5 +49 2014 may 12 used graphing calculator Graphing Calculators - Stat Trek Recommended graphing calculators for AP statistics and calculus. ... It also adds
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the determinant and inverse for any square matrix. Use matrix algebra to solve ... 5 +13 2014 may 01 statistical power calculator Statistical Power - Stat Trek How to Find the Power of a Statistical Test ... We enter the following values into
the calculator : value = 294.45; mean = 290; and standard deviation = 2.83. 5 ~ 2014 apr 28 sample mean symbol Statistics Notation - Stat Trek This web page describes how symbols are used on the Stat Trek web site to
represent ... μ refers to a population mean; and x, to a sample mean . σ refers to
the ... 5 ~ 2014 apr 25 chi square distribution Chi - Square Distribution - Stat Trek The distribution of the chi-square statistic is called the chi - square distribution . In
this lesson, we learn to compute the chi-square statistic and find the probability ... 5 +6 2014 apr 24 standard deviation definition Standard Deviation : Definition - Stat Trek Definition of standard deviation , from the Stat Trek dictionary of statistical terms
and concepts. This statistics glossary includes definitions of all technical terms ... 5 +1 2014 apr 09 college statistics help This web site provides training and tools to help you solve statistics problems ...
AP and Advanced Placement Program are registered trademarks of the College ... 5 +9 2014 apr 07 margin for error 5 +5 2014 apr 01 statistics help probability Statistics , Probability , and Survey Sampling Free tutorials cover statistics , probability , and matrix algebra. ... This web site
provides training and tools to help you solve statistics problems quickly, easily,
and ... 5 +6 2014 mar 24 create random number Use the Random Number Generator to create a list of random numbers , based
on your specifications. Create a random number table of up to ... 6 +6 2014 jun 11 least-squares regression line Simple linear regression. How to define least - squares regression line . How to
find coefficient of determination. Includes video lesson on regression analysis. 6 +3 2014 may 24 random generator 6 +8 2014 may 18 mean test Hypothesis Test for Mean - Stat Trek How to conduct a hypothesis test for a mean value, using a one-sample t- test .
The test procedure is illustrated with examples for one- and two-tailed tests . 6 +43 2014 apr 24 poisson in excel Poisson Distribution Calculator - Stat Trek The Poisson Calculator makes it easy to compute individual and cumulative
Poisson probabilities. For help in using the .... Analyzing Business Data with
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exam questions . ... The correct answer is B. The solution involves four steps. 6 +4 2014 mar 23 success calculator software Binomial Calculator - Stat Trek ? In a binomial experiment, the probability of success on any individual trial is
constant. 7 +94 2014 jun 17 test ofa Power of Hypothesis Test - Stat Trek The power of a hypothesis test is the probability of not committing a Type II error.
Power is affected by significance level, sample size, and effect size. 7 +9 2014 jun 06 variance calculator formulate Statistics Formulas - Stat Trek Trek tutorials. Each formula links to a web page that explains how to use the
formula . .... Variance of a linear transformation = Var(Y) = a * Var(X).
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? Assume that the teams are evenly matched. Solution : This is a very tricky ... 7 +1 2014 may 30 random number generator 7 +35 2014 may 15 linear regression Simple linear regression . How to define least-squares regression line . How to
find coefficient of determination. Includes video lesson on regression analysis. 7 +5 2014 apr 28 generate random numbers 7 +29 2014 apr 27 standard deviation symbol This web page describes how symbols are used on the Stat Trek web site to
represent ... μ refers to a population mean. σ refers to the standard deviation of a
... 7 +23 2014 apr 27 how to calculate probability Probability and Statistics - Stat Trek What is probability? Describes how to interpret probability. Shows how to
compute probability . Includes sample problem with solution plus free, video
lesson. 7 +53 2014 apr 22 true random number generator Although no computer algorithm can produce numbers that are truly random, Stat
Trek's Random Number Generator produces numbers that ... 7 -1 2014 apr 20 scales of measurement Measurement Scales - Stat Trek Measurement scales are used to categorize and/or quantify variables. This
lesson describes four scales of measurement used in statistical analysis: nominal
, ... 7 +2 2014 apr 14 random number generater Use the Random Number Generator to create a list of random numbers, based
on your specifications. Create a random number table of up to ... 7 +4 2014 apr 02 stat test questions AP Statistics Practice Test - Stat Trek Practice test for multiple-choice section of the Advanced Placement (AP)
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bar charts, back-to-back stemplots, parallel boxplots, etc. Includes free video. 8 +68 2014 may 30 random number 8 +2 2014 may 05 help with statistics Statistics and Probability This web site provides training and tools to help you solve statistics problems
quickly, easily, and accurately - without having to ask anyone for help . 8 +40 2014 may 01 statistic for dummies Identify a sample statistic . Choose the statistic (e.g, sample mean, sample
proportion) that you will use to estimate a population .... Statistics II for Dummies 8 ~ 2014 apr 26 disrecete data example Discrete vs Continuous - Stat Trek Discrete probability distributions vs continuous probability distributions. Discrete
random ... Some examples will clarify the difference between discrete and
continuous variables. Suppose the fire ... Counting data points. ▻ Probability
laws. 8 +4 2014 apr 24 what are variables Variables in Statistics - Stat Trek Covers use of variables in statistics - categorical vs. quantitative, discrete vs.
continuous, univariate vs. bivariate data. Includes free video lesson. 8 +68 2014 apr 14 independent random variables Random Variable Combinations - Stat Trek Sometimes, it is necessary to add or subtract random variables. When this occurs
... Sums and Differences of Independent Random Variables : Effect on Variance. 8 +1 2014 apr 13 random number genrator 9 +10 2014 jun 03 parameter error check How to Test Hypotheses - Stat Trek How to test hypotheses using four steps: state hypothesis, formulate analysis
plan, analyze ... Test statistic = (Statistic - Parameter ) / (Standard error of statistic). 9 +31 2014 may 22 sixe n Unless the population size is very large, you need to specify the size of the
population ( N ). Given these inputs, the following formulas find the smallest
sample ... 9 +10 2014 may 16 generate random number 9 +3 2014 may 12 tutorial outliers statistics Influential Points in Regression - Stat Trek For example, when the data set is very large, a single outlier may not have a big
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constants. Expected .... aX + b. Variance of a linear transformation = Var(Y) = a *
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and interpret ... Often, the margin of error is not given; you must calculate it. 10 +13 2014 may 22 letter matrix Matrix Notation - Stat Trek General Matrices . Bold-face, capital letters refer to matrices , italic capital letters
refer to matrix elements, and subscripts reveal matrix dimension. For example,.