Question

The s.d of data set 9,9,9,9,9 is

Answer 1

Answer:

Set up the formula for sample standard deviation. The standard deviation of a set of values is a measure of the spread of its values.

s

=

n

∑

i

=

1

√

(

x

i

−

x

a

v

g

)

2

n

−

1

Set up the formula for standard deviation for this set of numbers.

s

=

√

(

9

−

9

)

2

+

(

9

−

9

)

2

+

(

9

−

9

)

2

+

(

9

−

9

)

2

+

(

9

−

9

)

2

+

(

9

−

9

)

2

+

(

9

−

9

)

2

7

−

1

Simplify the result.

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s

=

0

The standard deviation should be rounded to one more decimal place than the original data. If the original data were mixed, round to one decimal place more than the least precise.