For the first three months of 2012, the stock market put up its best first-quarter performance in over a decade (, April 9, 2012). The accompanying table shows a portion of the daily price index for the Dow Jones Industrial Average (DJIA) over this period. The entire data set, labeled DJIA_2012, can be found on the text website.
Day ....... DJIA Price Index
January 3, 2012 ... 12,397
January 4, 2012 .... 12,418
: :
March 31, 2012 ... 13,212

a. Construct a frequency distribution and histogram for the DJIA price index. Use five classes with upper limits of 12,500, 12,750, etc. On how many days during this quarter was the DJIA less than 12,500?
b. Construct a relative frequency polygon. Is the distribution symmetric? If not, is it positively or negatively skewed?
c. Construct an ogive. Approximate the percentage of days that the DJIA was less than 13,000.

  • CreatedJanuary 28, 2015
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