The measure of central tendency best-suited for data on a nominal scale is the: mean mode median interquartile range

The measure of central tendency best-suited for data on a nominal scale is the mode.

Here's a brief explanation:

• Mean: This is the average and is not appropriate for nominal data since you cannot perform arithmetic operations on categories.
• Mode: This is the most frequently occurring value in a data set. It is suitable for nominal data because it identifies which category appears most often.
• Median: This represents the middle value of sorted data, which is also not appropriate for nominal data.
• Interquartile Range: This measures the spread of the middle 50% of data and is applicable only to ordinal or interval data.

Final Answer

Mode