Hi. i believe Im suppose to use wolfram for these? Im unsure of how to solve #3

Question

Hi. i believe Im suppose to use wolfram for these? Im unsure of how to solve #3 and #4 however. please help! thank you so much.

3. Consider the following data: 12, 22, 23, 18, 15, 18). Find the mean, median, mode, range, and standard deviation. 4. Below is he data for a speed reading course in words per minute. 1000 650 700 600 900 1000 750 1100 800 1050 800 950 1000 800 850 700 900 1000 900 750 850 850 950 650 Find the mean, median, mode, range, and standard deviation for this data set. Use of calculator is encouraged.

Explanation / Answer

3)

mean = sum of all number/total number = 108/6 = 18

median

arrange the data in ascending order
12,15,18,18,22,23

median = (18+18)/2 = 18

mode is the most repeated number
Mode = 18

Range
Range = (largest -smallest)value
= ( 23 -12) = 11

std.deviation

Variance =summation of ( x - mean)^2/n-1
= (12 - 18)^2 + (15 - 18)^2 + (18 - 18)^2 + (18 - 18)^2 + (22 - 18)^2 + (23 - 18)^2/5
= 17.2
Std.deviation = sqrt(variance)
= sqrt(17.2) = 4.1473

4)

mean = sum of all number/total number = 20500/24 = 854.1667

median

median = (850+850)/2 = 850

mode is the most repeated number
Mode = 1000

Range
Range = (largest -smallest)value
= ( 1100-650) = 450

std.deviation

Variance = 18894.93

Std.deviation = sqrt(variance)
= sqrt(18894.93) = 137.4588

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