Identify the level of measurement of the data, and explain what is wrong with the given calculation .In a set of data, coursegrades are represented as 1 for 'A' 2 for 'B', and 3 for 'C'. The average (mean) of the 688 coursegrades is 1.3.

The data are at the nominal/ interval /ratio / ordinal level of measurement.

Part 2

What is wrong with the given calculation?

A. The true average (mean) is 2.5.

B. Such data should not be used for calculations such as an average (mean).

C. One must use a different method to compute the average (mean) of such data.

D. There is nothing wrong with the given calculation.