Measures of Central Tendency
... They are also called statistics of location, and are the complement of statistics of dispersion, which provide information concerning the variance or distribution of observations. In the univariate context, the mean, median and mode are the most commonly used measures of central tendency. comp ...
... They are also called statistics of location, and are the complement of statistics of dispersion, which provide information concerning the variance or distribution of observations. In the univariate context, the mean, median and mode are the most commonly used measures of central tendency. comp ...
m - World Bank
... Sources of Error in Surveys 1. Sampling error 2. Bias - repeated inaccuracy in estimation (e.g. from omitted variables) 3. Manual error (2) and (3) can be reduced with experience and careful choice of statistical test; (1) Inherent to surveys – need to think about sampling error from the start! ...
... Sources of Error in Surveys 1. Sampling error 2. Bias - repeated inaccuracy in estimation (e.g. from omitted variables) 3. Manual error (2) and (3) can be reduced with experience and careful choice of statistical test; (1) Inherent to surveys – need to think about sampling error from the start! ...
Presentation of Data
... Measures of Dispersion; The Range The range is an important measurement Range ...
... Measures of Dispersion; The Range The range is an important measurement Range ...
Unit 5 Confidence Intervals Introduction
... Confidence intervals give an interval in which the mean of a population lies, subject to a certain probability, e.g. 95% confidence intervals are based on the probability of being correct 95% of the time, that is, probability of being wrong is 5% or 1 in 20. The interval is based on both the sample ...
... Confidence intervals give an interval in which the mean of a population lies, subject to a certain probability, e.g. 95% confidence intervals are based on the probability of being correct 95% of the time, that is, probability of being wrong is 5% or 1 in 20. The interval is based on both the sample ...
discrete probability distributions
... - binomial probability distribution requires selection of objects with replacement - when objects are selected without replacement, the two most important assumptions underlying the binomial distribution are not met: probability of success from trial to trial is not constant and the trials are not i ...
... - binomial probability distribution requires selection of objects with replacement - when objects are selected without replacement, the two most important assumptions underlying the binomial distribution are not met: probability of success from trial to trial is not constant and the trials are not i ...
Chapter 4. Probability-The Study of Randomness 4.1.Randomness
... many years a simple relative frequency definition of probability was all that was known and was all that many felt was necessary. This definition proceeds roughly as follows. Suppose that an experiment is to be performed; thus there are several possible outcomes which can occur when the experiment i ...
... many years a simple relative frequency definition of probability was all that was known and was all that many felt was necessary. This definition proceeds roughly as follows. Suppose that an experiment is to be performed; thus there are several possible outcomes which can occur when the experiment i ...