The 2011€“2012 tuitions (in thousands of dollars) of 2-year, public colleges are described by the density histogram in Fig. 99. Some of the tuitions are greater than 8 thousand dollars, but the bars for those tuitions would not be visible.

a. What variable is described by the histogram? Is it discrete or continuous?
b. Estimate the proportion of the colleges that had tuitions between $3000.00 and $3999.99, inclusive.
c. What proportion of the colleges had tuitions less than $6 thousand?
d. Identify the class that contains the 50th percentile, which is a measure of the center. Are observations in the class typical values? Explain.
e. What proportion of the colleges had tuitions at least $6 thousand? Some of the bars in the density histogram were left blank on purpose.

Transcribed Image Text:

Tuitions of 2-Year, Public Colleges 0.40 0.30 A 0.20 0.30 0.32 0.100.15 0.07 0450 135 0.09 0.05 Thousands of dollars