Estimate the true proportion of home
A report states that 46% of home owners had a vegetable garden. How large a sample is needed to estimate the true proportion of home owners who have vegetable gardens to within 3% with 99% confidence?
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The amount of time that a custome spends waiting at an airport check-in counter is a random variable with mean 8.3 minutes and a standard deviation 1.5 minutes. Suppose that a random of n=49 customers is observed. Find the probability that the ave
The correlation between GPA and number of Facebook friends is -0.686. Us eht correlation and significance level of 5% to test for a negative linear association between GPA and number of Facebook friends. Include the details of the test.
Do new visits vary with the phase of the moon? Do the appropriate statistical test and write a statement of results.
Suppose the amount of cosmic radiation to which a person is exposed folows normal distributioin with a mean 5.853 and standrad deviation 1.361. What is the probability that the person will be exposed to more than 8.625 units of cosmic radiation?
The number of monthly breakdowns of a computer is a random variable having Poisson distribution with lambda=1.8. Use Poisson distribution formula to find the probability that there will be at most four breakdowns.
The article indicated that 600 FBI agents were required to take a polygraph test. Consider the random variable x = number of the 600 tested who fail. If all 600 agents tested are trustworthy, what are the mean and standard deviation of x?
A safety engineer claims that 3 in 12 automobile accidents are due to driver fatigue. Using the formula for Binomial Distribution find the probability that at least 2 of 5 automobile accidents are due to driver fatigue.
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