given the data 12,39,21,18,24,17,12,25:

A. what is the outlier in the data?
B. what is the mean with the outlier?
C. what is the mean without the outlier?

A. 12;;21;18.4
B. 12;18.4;21
C. 39;21;18.4
D. 39;18.4;21

i think B or D

the answer is C

giggity

Neither B or D is right.

would it be A?

Do you know how to find what they are asking (outlier, mean)?

no

Its A

To find the outlier, you can start by ordering the data in ascending or descending order. In this case, let's arrange the data in ascending order: 12, 12, 17, 18, 21, 24, 25, 39.

Now, let's identify the outlier. An outlier is a data point that significantly differs from the rest of the data. One common way to identify potential outliers is by using the Tukey's fences method, which classifies any value below Q1 - (1.5 * IQR) or above Q3 + (1.5 * IQR) as an outlier. Here, Q1 is the first quartile, Q3 is the third quartile, and IQR is the interquartile range.

To calculate the mean with the outlier, we simply sum up all the values and divide by the total number of values (8 in this case).

To calculate the mean without the outlier, we need to exclude the outlier from our calculation. We sum up all the values excluding the outlier and divide by the total number of values minus 1.

Let's calculate the answers:

A. The outlier in the data is 39.
B. The mean with the outlier can be calculated as (12 + 39 + 21 + 18 + 24 + 17 + 12 + 25) / 8 = 18.4.
C. The mean without the outlier can be calculated as (12 + 21 + 18 + 24 + 17 + 12 + 25) / 7 = 18.4.

So, the correct answer is option B: 12; 18.4; 21.

http://www.mathsisfun.com/data/outliers.html