R Programming 8 : Mean, Standard Deviation,

Mean:The 'mean' is the 'average you're used to, where you add up all the numbers and then
divide by the number of numbers.

Find the mean, median, mode, and range for the following values:
10, 11, 12, 13, 14, 15, 16, 17, 18

The mean is the usual average, so:

(10+11+12+13+14+15+16+17+18) ÷ 9 = 14

R Command:

> mean(cars$speed)
[1] 15.4

Median: The median is the middle value.
First Sort the Values in increasing Order then take middle value
Ex:
1,5,3,7,2,6,10,8
Sorting: 1,2,3,6,7,8,10
Median Value = 6

R Command:

> median(cars$speed)
[1] 15

Range:

The largest value is 13 and Smallest value is 6, so the range is 13-6 =7

> range(cars$speed)
[1]  4 25

Mode:
The mode is the number repeated most often. This list has two values that are
repeated three times.
library(doBy)
library(dplyr)