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Use the Poisson model to approximate the probability. Round your answer to four decimal places. The probability that a car will have a flat tire while driving through a certain tunnel is 0.00007. Use the Poisson distribution to approximate the probability that among 10,000 cars passing through this tunnel, at least one will have a flat tire.
Election officials take a random sample of 100 signatures and thoroughly investigate them to find that 84% are valid. Is this statistically significant evidence that the candidate has enough valid signatures overall? Explain.
Statisticians prefer large samples. Describe briefly the effect of increasing the size of a sample on each of the following: The margin of error of a 95% confidence interval?
Listed below are the highway fuel consumption amounts (in mi/gal) from cars in three different categories. Use a 0.05 signifiacance level to test the claim that the different car categories have the same median highway fuel consumption.
Using a 5% level of significance, is there any difference in proportion of guests who would select the two resorts? What is your conclusion?
Discuss ratio, interval, nominal and ordinal variables. Explain what is meant by a margin of error for a confidence interval.
Finds that their mean travel time is = 22.5 minutes. What are the null and alternative hypotheses for testing whether the true mean is different from 20 minutes?
Supplier B's tires have an average life of 60,000 miles with a standard deviation of 2,000 miles. Which of the following statements is true?
Identify a research issue, opportunity, or problem that uses data that has absolute zero measurements. Some examples include a team member's stock portfolios performance
A random sample of the lifetime of 49 UltraIllum light bulbs has a mean of 3,960 hours and a standard deviation of 200 hours. Construct a 95% confidence interval estimate of the mean lifetime for all UltraIllum light bulbs.
If there are 12 business-class passengers and 50 tourist-class passengers on a particular flight, what are the expected value of total luggage weight and the standard deviation of the total luggage weight?
Random sample from population of male runners in town or city. Create and interpret the 95% confidence interval for mean, mean of the population from which sample is drawn.
What is coefficient of determination? Calculate F statistic. (Hint: You must complete the table to answer the question.)
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