Stock performance. The following table displays information for 40 widely held U.S. stocks, on how their oneday change on March 15, 2007 compared with their previous 52-week change.

a) What percent of the companies reported a positive change in their stock price over the prior 52 weeks?

b) What percent of the companies reported a positive change in their stock price over both time periods?

c) What percent of the companies reported a negative change in their stock price over both time periods?

d) What percent of the companies reported a positive change in their stock price over one period and then a negative change in the other period?

e) Among those companies reporting a positive change in their stock price over the prior day what percentage also reported a positive change over the prior year?

f) Among those companies reporting a negative change in their stock price over the prior day what percentage also reported a positive change over the prior year?
g) What relationship, if any, do you see between the performance of a stock on a single day and its 52-week performance?

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MARCH 15, 2007 Over prior 52 weeks Positive Change Negative Change 11 Positive Negative Change Change 14 9 6