Use only the sunspot numbers for the following.
a. Find the mean, median, range, standard deviation, and variance.
b. Are the sunspot numbers categorical data or quantitative data?
c. What is the level of measurement of the data? (nominal, ordinal, interval, ratio)

Listed below are annual high values of the Dow Jones Industrial Average (DJIA) and annual mean sunspot numbers for eight recent years. Use the data for Exercises 1–5. A sunspot number is a measure of sunspots or groups of sunspots on the surface of the sun. The DJIA is a commonly used index that is a weighted mean calculated from different stock values.

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DJIA Sunspot Number 7.5 14,198 13,338 2.9 10,606 11,625 12,929 13,589 16,577 18,054 3.1 16.5 55.7 57.6 64.7 79.3