HP 35s HP 35s scientific calculator - User Guide - Page 173
Population Standard Deviation, Linear Regression
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Population Standard Deviation Population standard deviation is a measure of how dispersed the data values are about the mean. Population standard deviation assumes the data constitutes the complete set of data, and is calculated using n as a divisor. Press for the population standard deviation of the x- values. Press for the population standard deviation of the y-values. Example: Population Standard Deviation. Grandma Hinkle has four grown sons with heights of 170, 173, 174, and 180 cm. Find the population standard deviation of their heights. Keys: () Display: Description: Clears the statistics registers. Enters data. Four data points accumulated. Calculates the population standard deviation. Linear Regression Linear regression, L.R. (also called linear estimation) is a statistical method for finding a straight line that best fits a set of x,y-data. Note To avoid a message, enter your data before executing any of the functions in the L.R. menu. Statistical Operations 12-7