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1. Compute the 95% confidence interval on the population mean if a sample of 1000 is taken and the sample mean is found to be 15.95 and standard deviation is 4.2.
Interpret the interval. What does it mean?
2. Test to see if a population mean is greater than the assumed (or historical) value of 16. When a sample of 1000 was taken the sample mean was computed to be 15.95 and the sample standard deviation was 4.2.
At a board meeting of 20 businessmen, all of whom wear ties, what is the probability that:
A professor obtains SAT scores and freshman grade point averages (GPAs) for a group of n=15 college students. The SAT scores have a mean of M=580 with SS=22,400, and the GPAs have a mean of 3.10 with SS=1.26, and SP=84.
Use a test of the difference between proportions when answering these questions.
Assume that a 95% confidence interval for the mean is 15.0
What is the expected value and variance for the number of contacts in eight attempts?
What is the probability that he will answer all questions correctly?
Airlines monitor the causes of flights arriving late. 75% of flights are late because of weather, 35% of flights are late because of ground operations. 10% of flights are late because of weather and ground operations.
Does there seem to be any difference in the effect of the antibiotics on clearance of otitis media? Express your results in terms of relative risk (RR). Consider separate analyses for unilateral and bilateral cases. Also consider an analysis combi..
If absolute value of test statistic is less than critical value in hypothesis test decision is to?
Explain the relationship between total gross and opening gross total gross and number of theatres total gross and week in top 60.
Their monitoring plan will take a random sample of 5 days sales per month and use the sample mean sales to identify shops that are under-performing. Establish the lower limit sales such that only 5% of the shops would have a sample sales mean belo..
When 6 telephones are received, all of them are free of defects. What is the written description of the complement of the above event?
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