Question

The following is a sample of 20 measurements. 8 8 4 12 13 12 9 12 11 12 126 8 9 13 12 12 8 10 12

a. Compute x overbarx​, s squared​, s for this sample.

​(Round to two decimal places as​ needed.)

Answer 1

the necessary calculation table :-

x	x2
8	64
8	64
4	16
12	144
13	169
12	144
9	81
12	144
11	121
12	144
12	144
6	36
8	64
9	81
13	169
12	144
12	144
8	64
10	100
12	144
sum=203	sum=2181

sample size (n) = 20

i).the sample mean be:-

ii).the sample variance be:-

iii).the sample standard deviation be:-

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