Question 1
Traffic accidents Police reports about the traffic accidents they investigated last year indicated that 40% of the accidents involved speeding, 25% involved alcohol, and 10% involved both risk factors.
a. What is the probability that an accident involved neither alcohol nor speed?
b. Do these two risk factors appear to be independent? Explain.
Question 2
Bowling A large corporation sponsors bowling leagues for its employees. The mean score for men was 154 pins with a standard deviation of 9 pins, while the women had mean score 144 pins and standard deviation 12 pins. At the end of the season the league holds a tournament that randomly pairs men and women as opponents in the first round.
a. On average, how much do you expect the man to win by?
b. Estimate the standard deviation of the differences in the competitor's scores.
c. What assumption did you make in determining the standard deviation?
Mutualisms, such as those that occur among plants and pollinators, generally involve large numbers o
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Simplified Motor Score