The mean = 28, the median = 28, the mode = 34 and the standard deviation = 5.2
How do we find the mean, median, mode and standard deviation?
The mean is the sum of all numbers divided by the count of numbers.
20 + 23 + 25 + 27 + 29 + 32 + 34 + 34
224/8
Mean = 28
The median is the middle number in a sorted, ascending or descending, list of numbers.
20, 23, 25, 27, 29, 32, 34, 34
27 + 29 = 56/2
Median = 28
The mode is the number that appears most frequently in a data set.
20, 23, 25, 27, 29, 32, 34, 34
mode = 34
The standard deviation is a measure of the amount of variation or dispersion in a set of values.
(20−28)² + (23−28)² + (25−28)² +(27−28)² +(29−28)² +(32−28)² + (34−28)² +(34−28)² 8-1
64 + 25 + 9 + 1 + 1 + 16 + 36 + 36
188/7
Standard deviation = √26.857
Standard deviation = 5.18