The following table displays information for 470 of the S&P 500 stocks, on how their one-day change on October 24, 2011 (a day on which the S&P 500 index gained 1.23%) compared with their year to date change.

a) What percent of the companies reported a positive change in their stock price over the year to date?
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 a negative change in the other period?
e) Among those companies reporting a positive change in their stock price on October 24 over the prior day what percentage also reported a positive change over the year to date?
f) Among those companies reporting a negative change in their stock price on October 24 over the prior day what percentage reported a positive change over the year to date?
g) What relationship, if any, do you see between the performance of a stock on a single day and its year-to-date performance?

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Year to Date Positive Negative Change Change Positive Change164 Negative 233 48 25 Change