The following table can be used to help solve the problem Fi

The following table can be used to help solve the problem:

Find the sample mean:

Find the sample standard deviation: (round to four decimal places)

Please make the final answer for each sample mean and standard deviation in bold so I can easily find it

i	xi	fi	xifi	(xi- )	(xi- )2	(xi- )2 fi
1	1	3
2	2	4
3	3	3
Totals

Solution

Here we are given that data of size 3.

And we have to find sample mean and sample standard deviation.

Formula for sample mean is,

sample mean = fi*xi / fi

sample standard deviation = sqrt [ (xi-xbar)²*fi / n-1 ]

where n = fi

The complete table is as follows:

sample mean = 20 / 10 = 2

n = 10

sample standard deviation = sqrt [ 6/10-1 ]

= sqrt [ 6 / 9 ]

sample standard deviation = 0.8165