U.S. Census data for San Luis Obispo County, California, were used to construct the following frequency distribution
Question:
a. Notice that not all intervals in the frequency distribution are equal in width. Why do you think that unequal width intervals were used?
b. Construct a table that adds a relative frequency and a density column to the given frequency distribution (see Example
3.17).
c. Use the densities computed in Part (b) to construct a histogram for this data set. (Note: The newspaper displayed an incorrectly drawn histogram based on frequencies rather than densities!) Write a few sentences commenting on the important features of the histogram.
d. Compute the cumulative relative frequencies, and construct a cumulative relative frequency plot.
e. Use the cumulative relative frequency plot constructed in Part (d) to answer the following questions. i. Approximately what proportion of commute times were less than 50 minutes?
ii. Approximately what proportion of commute times was greater than 22 minutes? iii. What is the approximate commute time value that separates the shortest 50% of commute times from the longest 50%?
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...
Step by Step Answer:
Statistics The Exploration & Analysis Of Data
ISBN: 9780840058010
7th Edition
Authors: Roxy Peck, Jay L. Devore