Question

Consider the following random sample of data:
-9,0,2,-10,4,4,-4,4,-4,85

a) What is the mean of the sample data?
Round your response to the least 2 decimal places.

b) If the outlier is removed, what is the mean of the remaining sample data?
Round your response to at least 2 decimal places.

Answer 1

Using the mean concept, we have that:

a) The mean of the sample data is of 7.20.

b) Removing the outlier, the mean of the remaining sample data is of -1.44.

What is the mean?

The mean of a data-set is given by the sum of all observations in the data-set divided by the number of observations.

For the data-set given in this problem, with 10 observations, the mean is given by:

M = (-9 + 0 + 2 - 10 + 4 + 4 - 4 + 4 - 4 + 85)/10 = 7.2.

85 is an outlier, hence the mean of the remaining 9 observations is given by:

M = (-9 + 0 + 2 - 10 + 4 + 4 - 4 + 4 - 4)/9 = -1.44..

More can be learned about the mean of a data-set at https://brainly.com/question/24628525

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