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If the probability that a tourist visiting the Grand Canyon will be bitten by a rattlesnake is .00002, us the Poisson distribution to approximate the probability that at least 2 of 75,000 tourists will be bitten. (Hint: the mean of the Poisson random variable used to approximate the probability is the mean of the actual random variable.)
question 1 nbspin switzerland an insurance agency retail life insurance called savings life insurance sli. the skill to
four mutually exclusive events a b c and d have probabilities of 0.1 0.2 0.3 and 0.4 respectively. what are the
on the average mr. z drinks and drives once in 4 years. he knows that every time when he drinks and drives he is caught
Here is a two-way table showing enrollment data for full-time undergraduate students in U.S. colleges and universities. The entries are thousands of students:
What is the probability that a particular driver has two speeding violations.
If we assume that the lifetime of this type of bulb has a standard deviation of 400 hours, can we conclude at the 5% significance level that the claim is true.
We want to test the hypothesis about fairness of spinning the coin. Evaluate the true proportion of heads. Use 95% confidence interval. Do not forget to check conditions first.
two students jen and john are registered for the same class and attend independently to each other jen 96 of the time
Normally distributed with an average of 125 minutes and a standard deviation of 18 minutes. What is the probability that a student taking this test will finish in 100 minutes or less?
Is the difference in mean scores large enough to be important? (d) Is it reasonable to assume equal variances? (e) Carry out a formal test for equal variances at α = .05, showing all steps clearly.
At the 0.01 level of significance, that the mean lifetime of light bulbs made by this manufacturer differs from 49 months? Perform a two-tailed test.
a local microbrewery believes it produces the best tasting dark beer in baltimore. to make its case 7 volunteers are
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