3 Describing data

Question 1

sample mean

Answer 1

is the sum of all observations in a sample divided by n, the number of observations

Question 2

standard deviation

Answer 2

is a common measure of the spread of a distribution

Question 3

coefficient of variation

Answer 3

is the standard deviation expressed as a percentage of the mean

Question 4

median

Answer 4

is the middle measurement of a set of observations

Question 5

interquartile range

Answer 5

is the difference between the first and third quartiles of the data

Question 6

box plot

Answer 6

is a graph that uses lines and a rectangle to display the median, quartiles, extreme measurements, and range of the data