#### A PHP Error was encountered

Severity: Warning

Message: count(): Parameter must be an array or an object that implements Countable

Filename: controllers/calculator.php

Line Number: 37

Statistics Calculator - Online Calculator - Tutorpace

# Statistics Calculator

## Online Tutoring Is The Easiest, Most Cost-Effective Way For Students To Get The Help They Need Whenever They Need It.

Statistics is calculation using mean, median, range, mode, minimum, maximum, harmonic mean, geometric mean, variance, corrected variance, standard deviation, relative standard deviation, coefficient of variation, mean and median deviation, also Skewness. All these help us to calculate a collection of numbers and know statistical properties. . Statistic calculator is used to find mean , median , mode , range of  numbers

Example 1: Compute mean, median and range for these set of numbers, 1,2,3,4,5,6,7,8,9,10, 11,12.

Mean : We need to add up all the numbers and divide the answer by number of values in the data. Therefore

when we add we get = 78/12 = 6.5

Mean = 6.5

Range : We need find the lowest and the highest value of the data and then subtract them to get the range.

Range = 11

Median : We need to put the numbers in order and find the middle value. When we have even values we find

the mean of the 2 middle numbers

Median: 6.5

Example 2: Compute mean, variance and standard deviation for these set of numbers 600, 170, 430, 300, 470

Mean : We need to add up all the numbers and divide the answer by number of values in the data. Therefore

when we add we get = 1970/5 = 394

Variance : Take difference of each value with mean, square the answers and find the average.

Value – mean : 206, -224, 76, -94, 36

Variances =  42436 + 50176+ 5776 + 8836+ 1296 = 108520/5 = 21704

Standard deviation :  We need to find out standard deviation that will help measure how spread out numbers

are. We find the square root of the variance

√21704 = 147.32… = 147.