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One effect of the great recession was to lower the interest rate on fixed-rate mortgages.
A sample of 30-year fixed-rate mortgage rates taken from financial institutions in the
Pacific Northwest resulted in the following:
a. Construct a histogram with eight classes beginning at 3.46.
b. Determine the proportion of 30-year fixed mortgage rates that are at least 3.76%.
c. Produce an ogive for the data.
J.D. Power and Associates’ annual customersatisfaction survey, the Automotive
Performance, Execution and Layout (APEAL) StudySM, in its 13th year, was released on September 22, 2008. The study measures owners’ satisfaction with the design, content, layout, and performance of their new vehicles. A file titled APEAL2 contains the satisfaction ratings for 2008 for each make of car.
a. Construct a histogram that starts at 710 and has class widths of 20 for the APEAL ratings.
b. The past industry average APEAL rating was 866 for 2005. What does the 2008 data suggest in terms of the relative satisfaction with the 2008 models?