The 2011€“2012 tuitions (in thousands of dollars) of 4-year, private, not-for-profit universities and colleges are described by the density histogram in Fig. 98. Some of the tuitions are greater than 45 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. Identify the class that contains the 50th percentile, which is a measure of the center. Are observations in the class typical values? Explain.
c. What proportion of the institutions had tuitions less than $30 thousand?
d. What proportion of the institutions had tuitions at least $35 thousand? Some of the bars in the density histogram were left blank on purpose.
e. Find the proportion of the institutions that had tuitions between $35,000.00 and $39,999.99, inclusive.

Transcribed Image Text:

Tuitions of 4-Year, Private, Not-for-Profit Universities and Colleges 0.04 0.03 0.02 0.18 0.17 20.13 0.12 0.12 0.01 0.03 5 10 15 20 25 30 35 40 45 Thousands of dollars