mmw quiz finals

• The simplest measure of dispersion is the Range. The Range is the difference between the highest and the lowest values in the set of data.
• Varience the measure of dispersion that removes negative signs by squaring all deviations of each number from its mean and getting the average of the squared deviations is the variance.
• The standard deviation is the most commonly used measure of variation. The standard deviation indicates how closely the values of a given data set are clustered around the mean. A lower value of the standard deviation means that the values of the given data set are spread over a smaller range around the mean. On the other hand, a large value of the standard deviation means that values of that data set are spread over a large range around the mean.
• Measure of central tendency is usually called average
• mean, median and mode are three kinds of average or sometimes called measure of central tendency
• most commonly used measure of central tendency is Mean
• sample mean - obtained by adding all the value in your sample and dividing by the sample size denoted by n
• population mean - if we were to collect the mean from a population instead of a sample
• Median is a set of data values in the middle value of the data set
• Mode a statistical term tat refers to the most frequently occurring number found in a set of numbers
• Midrange is a rough estimate of the middle. It is found by getting the average of the lowest and highest value of the data.
• Weighted mean is used to find the mean of values of data set that are not equally represented.
• measures of variation describes how item values cluster or scatter in distribution
• measures of variability which indicate the extent to which values in a distribution are spread around the central tendency
• Mode is found by collecting and organizing the data in order to count frequency of each result