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The travel-to-work time for residents of the world's large cities has been studied and reported in many publications. Suppose that a preliminary simple random sample of residents of a certain metropolitan area in North America is used to develop a planning value of 12.75 minutes for the population standard deviation.
If we want to estimate the population mean travel-to-work time for this metropolitan area with a margin of error of 3 minutes, what sample size would you recommend? Assume 99% confidence.
If we want to estimate the population mean travel-to-work time for this metropolitan area with a margin of error of 2 minute, what sample size would you recommend? assume 90% confidence
Please provide explanation.
When a particular machine is functioning properly, 80% of the items produced are non-defective. If three items are examined, what is the probability that.
a. How many variables are there in this study? What are the levels of any variable you identified? b. What hypothesis test would be used to analyze these data?
Personal phone calls received by a new employee was 3,5, and 6. assume that samples of size 2 are randomly selected with replacement from this population of three values. Find the mean of the distribution.
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To determine whether the mean is greater than 16 ounces using large sample test.
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when supermarket customers are offered free samplesthey take them 60 of the time. when 317 customers are observed what
What maximum value of the standard deviation would make 90% of the parts acceptable to the consumer (Assume the mean to be 1.012)
someone wishes to design a lottery according to the following rules each ticket costs 5 there are three prizes 10 100
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