STATISTICS Lecture Notes - Central Tendency, Nth Root, Nostril
Document Summary
Measures of central tendency mean median, mode, geometric mean, harmonic. Arithmetic mean or simply the mean of a variable is defined as the sum of the observations divided by the number of observations. If the variable x assumes n values x1, x2 xn then the mean, This formula is for the ungrouped or raw data. Calculate the mean for 2, 4, 6, 8, 10. Under this method an assumed or an arbitrary average (indicated by a) is used as the basis of calculation of deviations from individual values. Where, a = the assumed mean or any value in x d = the deviation of each value from the assumed mean. A student"s marks in 5 subjects are 75, 68, 80, 92, 56. The median is the middle most item that divides the group into two equal parts, one part comprising all values greater, and the other, all values less than median.
