ROUNDING NUMBERS
4.7890
4.79
YES OR NO
SD OR s
Standard deviation
DO WE USE THE RANGE?
NO, NOT REALLY
10.100000
10.10
CHILDREN BORN IN THE US IN 2022
INTERVAL
GREEK E SYMBOL
SUM EVERYTHING AFTER THE SYMBOL
+/- 1SD TELLS US
68% OF THE DATA LIVES HERE
.56789
.57
ORDINAL
M
MEAN
+/- 2 SD TELLS US
ABOUT 95% OF THE DATA LIVES HERE
3.9890
3.99
WHAT IS YOUR HAIR COLOR?
BROWN, BLONDE, BLACK, AUBURN, OTHER
ORDINAL
m
meter-we do not use this symbol!
+/-3 SD TELLS US
ABOUT 99.7% OF THE DATA LIVES HERE
57.64321
57.64
HOW MANY CHILDREN DO YOU HAVE?
RATIO
n
sample size
WHAT IS VARIANCE?
HOW SPREAD OUT THE DATA IS