GEOL 102 Lecture Notes - Lecture 11: Weighted Arithmetic Mean, Standard Deviation, Percentile

• School: Queen's University
• Department: Geological Sciences and Geological Engineering
• Course: GEOL 102
• Professor: Callum

Document Summary

Extraneous data: go to x# and change it. Clear data: shift - mode - 1 - enter. Shift - 2 - 1 (x bar for weighted mean) # of the data - shift - comma - frequency - m+ Shift - 2 - 1 (x bar for grand mean of value with high frequencies) # of the data then m+ after each number. Check to make sure everything is right, hit ac. Shift - 2 - 3 (x sigma n - 1 for standard deviation) 3 signi cant digits for standard deviation / variance. # of the x - shift - comma - p(x) - m+ Shift - 2 - 1 (x bar for mean) Shift - 2 - 2 (x sigma n for standard deviation) Index values from rst number to last number x(tilde) and mu(tilde) are universal symbols for median. Median point=index(median)= (n+1)/2 where n=total number of values.