Given data values of 2, 4, and 6, what is the effect of adding three numbers each equal to the mean?

Mean increases

Mean decreases

Mean remains the same

Data is invalid

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Q1.

What is the mean of the numbers 4, 8, and 12?

Q2.

Which of the following represents a characteristic of the mean?

Q3.

If the mean of the data set {5, 10, 15, 20} is 12.5, which statement is true?

Q4.

What happens to the mean if a new number much larger than the current mean is added?