The probability that both a and B. will occur is different from the probabilities that a will occur and that B. will occur.

Refer to the following data to answer questions 7 and 8. Just the answer

A random sample of song playing times in seconds is as follows:

7. Find the standard deviation. 28.65

8. Are any of these playing times considered unusual in the sense of our textbook? Explain. Does this differ with your intuition? Explain. The longest playing time, 293 seconds, could be considered somewhat unusual in that it is more than 1.5 standard deviations away from the mean, meaning more than 93% of data in the population (if normally distributed) would fall below this level -- 93% of songs would be shorter. Intuition says that this is not the case, and that though the song is longer this is simply part of the variation that exists...
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