Homework Help: Statistics

Posted by Nadia on Friday, March 18, 2011 at 11:34am.

Marks: --/20 What percentage of the general US population have bachelor's degrees? The Statistical Abstract of the United States (120th edition), gives the percentage of bachelor's degrees by state. For convenience, the data are sorted in increasing order.

17, 18, 18, 18, 19, 20, 20, 20, 21, 21
21, 21, 22, 22, 22, 22, 22, 22, 23, 23
24, 24, 24, 24, 24, 24, 24, 24, 25, 26
26, 26, 26, 26, 26, 27, 27, 27, 27, 27
28, 28, 29, 31, 31, 32, 32, 34, 35, 38

Find the interquartile range

Statistics - PsyDAG, Saturday, March 19, 2011 at 10:50am
Interquartile range = middle 50%

You have 50 scores arranged in order of value. 25th percentile is between 12th and 13th score, and the 75th percentile is between 37th and 38th score. What is the range for these two points?
Statistics - kc, Monday, February 11, 2013 at 11:34pm
20
Statistics - l, Tuesday, April 30, 2013 at 11:14pm
50%

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