If the median test finds the groups come from populations with the same median, what proportion of observations are above the median in each group?

• A. About 25% above and 75% below.
• B. About 50% above and 50% below.
• C. About 0% above.
• D. About 100% above.

Answer: (B)

The median is the 50th percentile: it splits the data so that half of the observations lie below and half lie above it. If two populations share the same median, each group has about 50% of its observations above that value (with any exact ties at the median not changing the overall idea). The other options would imply a different split (e.g., only a quarter above, none above, or all above), which contradicts the definition of the median.