what is the range of the values 2.0, 3.7, 4.9, 5.0, 5.7, 6.7, 8.5, 9.0? what is the median, mean, and mode?

Range = highest score - lowest

Mode is most frequently observed score, if there is one.

μ = Σx/n

Median is score with middle-most value. If two score are middle-most, find mean (μ) of the two middle-most values. Median = 50 percentile.