# statistics

A sample of 12 measurements has a mean of 34 and a standard deviation of 4.5. Suppose that the sample is enlarged to 14 measurements, by including two additional measurements having a common value of 34 each.

A. Find the mean of the sample of 14 measurements.

Mean =

B. Find the standard deviation of the sample of 14 measurements.

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3. 👁 85
1. Mean will remain unchanged as 34. but if the new values are different new mean will be computed as

12(34)+2(34)
-------------
12+2

476/14
=34

sample standard deviation

=

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posted by Syed
2. Part B op

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2. 👎 0
posted by Joe
3. 20.1656

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2. 👎 0

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