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Omar recorded the number of hours he worked each week for a year. Below is a random sample that he took from his data. 13, 17, 9, 21 What is the standard deviation for the data? Standard deviation: s = StartRoot StartFraction (x 1 minus x overbar) squared + (x 2 minus x overbar) squared + ellipsis + (x n minus x overbar) squared Over n minus 1 EndFraction EndRoot. 0 4.4 5.2 26.7

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lucic

13.71

Step-by-step explanation:

Given the data as : 13 , 17, 9, 21

Finding the mean of the data;

sum of data set =13+17+9+21=60

Number of data set ,n,= 4

Mean= sum/n =60/4 =15

Finding the deviation from the mean

13-4=9

17-4=13

9-4=5

21-4=17

Squaring the deviations from mean

9²=81

13²=169

5²=25

17²=289

Adding the squares of deviations from the mean

81+169+25+289 =564

Finding n-1

4-1=3

Finding variance

564/3 =188

Finding the standard deviation

√188 = 13.71

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Standard deviation : https://brainly.com/question/4257390

Keywords : random sample, data

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uzielvaldez2021

Answer:

5.2 - (C) on Edg

Step-by-step explanation: