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Two instruments are used to measure the height, h, of a tower. The error made by the less accurate instrument is normally distributed with mean 0 and standard deviation 0.0056h. The error made by the more accurate instrument is normally distributed with mean 0 and standard deviation 0.0044h. Assuming the two measurements are independent random variables, what is the probability that their average value is within 0.005h of the height of the tower?
A researcher is evaluating the influence of a treatment using a sample selected from a normally distributed population with a mean of u = 80 and a standard deviation of o= 20. The researcher expects a 12 point treatment effect and plans to use a t..
Twelve case of leukemia are reported in people living in a particular census tract over a five year period. Is this number of cases abnormal if only 6.7 cases would be expected based on national cance-incidence rates?
Confidence interval for the true mean and Evaluate the 95% confidence interval for the true mean advertising expense?
Description of data collection and analysis methods (how do you choose people for survey? Sampling plan or any others) Survey on according to the Australian market
Find a 99% confidence interval for the true mean heart rate of all people with this untreated condition. Show your calculations.
Finds the standard deviation of the time to prepare, copy and mail their tax return is 80 minutes. What is the standard error of the mean in this example?
when conducting a hypothesis test with chi-square analysis the rejection region in a chi-square distribution is always
Duracell Ltd claim that the life of their batteries in motorised soft toys is approximately normally distributed with a mean of 102.9 hours and a standard deviation of 16.5 hours.
suppose we want a 90 confidence interval for the average amount of time in minutes spent per week on homework by the
question a researcher believes that the percentage of people who exercise in california is greater than the national
Mathml equation = $32,000 and mathml equation = $3000. If 100 teachers are randomly selected, find the probability that their mean salary is greater than $32,500.
the random variable x has a binomial distribution with parameters n100 and p0.10. what distribution model would be
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