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2. x̅ and R chart - Wikipedia

   en.wikipedia.org/wiki/X̅_and_R_chart

   In statistical process control (SPC), the ¯ and R chart is a type of scheme, popularly known as control chart, used to monitor the mean and range of a normally distributed variables simultaneously, when samples are collected at regular intervals from a business or industrial process. [1]

3. Range (statistics) - Wikipedia

   en.wikipedia.org/wiki/Range_(statistics)

   In descriptive statistics, the range of a set of data is size of the narrowest interval which contains all the data. It is calculated as the difference between the largest and smallest values (also known as the sample maximum and minimum). [1] It is expressed in the same units as the data. The range provides an indication of statistical ...

4. Mode (statistics) - Wikipedia

   en.wikipedia.org/wiki/Mode_(statistics)

   Like the statistical mean and median, the mode is a way of expressing, in a (usually) single number, important information about a random variable or a population. The numerical value of the mode is the same as that of the mean and median in a normal distribution, and it may be very different in highly skewed distributions.

5. Central tendency - Wikipedia

   en.wikipedia.org/wiki/Central_tendency

   the arithmetic mean of data values after a certain number or proportion of the highest and lowest data values have been discarded. Interquartile mean a truncated mean based on data within the interquartile range. Midrange the arithmetic mean of the maximum and minimum values of a data set. Midhinge the arithmetic mean of the first and third ...

6. 68–95–99.7 rule - Wikipedia

   en.wikipedia.org/wiki/68–95–99.7_rule

   For an approximately normal data set, the values within one standard deviation of the mean account for about 68% of the set; while within two standard deviations account for about 95%; and within three standard deviations account for about 99.7%. Shown percentages are rounded theoretical probabilities intended only to approximate the empirical ...

7. Binomial distribution - Wikipedia

   en.wikipedia.org/wiki/Binomial_distribution

   Download as PDF; Printable version ... then the mean, median, and mode coincide ... if everything within 3 standard deviations of its mean is within the range of ...