data

Question 1

mode

Answer 1

most common number in a set

Question 2

mean

Answer 2

average of numbers in a set. total of all numbers/number of elements in the set

Question 3

mean from a frequency table

Answer 3

total of fx/total of f

Question 4

median

Answer 4

middle number when all members of a set are put in ascending order. (n+1)/2 th along (n is the number of elements in the set)

Question 5

range

Answer 5

difference between the highest and lowest values in a set

Question 6

variance

Answer 6

The variance measures how far each number in the set is from the mean. Variance is calculated by taking the differences between each number in the set and the mean, squaring the differences (to make them positive) and dividing the sum of the squares by the number of values in the set.

Question 7

standard deviation

Answer 7

A quantity expressing by how much the members of a group differ from the mean value. It is the positive square root of the variance