Which of the following is true for a median? Group of answer choices For an even number of observations, the median is the mean of the two middle numbers Median can be calculated no matter how the data is arranged A median is only meaningful for interval or ordinal data and not for ratio data Medians are affected by outliers

For an even number of observations, the median is the mean of the two middle numbers

Step-by-step explanation:

The median is the central point of any data set, when sorted in ascending or descending order. Since it only takes into account the central value, unlike the mean, it is not affected by outliers.

For a sample with an odd number of observations, the median is exactly the central value of the data set. For instance, the median of a data set with 3 observations is the 2nd one, while the median of data set with 5 observations is the 3rd one.

For a sample with an even number of observations, the median is mean of the two central values.  For instance, the median of a data set with 4 observations is the mean between the 2nd and 3rd values, while the median of data set with 6 observations is the mean between the 3rd and 4th values.

Therefore, the answer is For an even number of observations, the median is the mean of the two middle numbers.