Weighted mean differs from ordinary mean by assigning different weights to data points. Equal weights result in same weighted mean as ordinary arithmetic mean. Weighted means can be expressed using coefficients that sum to one
Mean is the average of given values in a data set. Mean symbol is denoted by 'x̄'. Mean equals sum divided by total number of observations
Average is the sum of values divided by their number. Works well with uniform data following normal distribution. Commonly used for calculating grades
Mean is the most popular measure of central tendency. Calculated as sum divided by number of values. Minimizes error in prediction of any value. Susceptible to outliers and skewed data
Five number summary shows statistical importance through data dispersion. Summary includes minimum, Q1, median, Q3, and maximum. Lower quartile contains 25% of data, upper quartile 75%. Median identifies data center, minimum and maximum show data length
GPA is a raw score average based on letter grades. Most US schools use 4-point scale: A=4, B=3, C=2, D=1, F=0. Final semester grades only count, not individual or midterm grades. GPA is calculated by dividing total grade points by number of classes