Measures of central tendency and variability
Reminders:
n: Count how many numbers there are
Mean: Add the numbers and divide by n
Degrees of freedom (df) (for variance): n-1
Variance:
Standard deviation (s): find the square root of the variance
For each data set, find: n, mean, df, variance and standard deviation
Data 1: 10, 5, 7, 8, 3
Data 2: 25, 45, 80, 65, 73, 88, 91, 100
Data 3: 133, 145, 188, 215, 225, 250, 168, 212, 127