To find the median score, we need to arrange the data in ascending order and then find the middle value.

The given test scores are:

11.7, 10.5, 10.2, 11.0, 11.7, 11.5, 11.7

Step 1: Arrange the scores in ascending order:

10.2, 10.5, 11.0, 11.5, 11.7, 11.7, 11.7

Step 2: Find the median:

Since there are 7 scores (an odd number), the median is the middle value in this ordered list.

The middle value is the 4th score.

10.2, 10.5, 11.0, 11.5, 11.7, 11.7, 11.7

So, the median score is 11.5.

Answer:

A. The median score is 11.5 (rounded to one decimal place).

Would you like further details or have any questions?

Related Questions:

1. How do you find the mean of a set of data?
2. What is the mode, and how is it determined for a data set?
3. Can there be more than one median in a data set? Why or why not?
4. How would you find the median if there were an even number of scores?
5. Why is the median considered a measure of the center of the data?

Tip:

For any set of data, the median is a valuable measure of central tendency, especially when the data set contains outliers, as it is not affected by extremely high or low values.