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The ages of a group of 131 randomly selected adult females have a standard deviation of 18.9 years. Assume that the ages of female statistics students have less variation than ages of females in the general? population, so let sigmaσ=18.9 years for the sample size calculation. How many female statistics student ages must be obtained in order to estimate the mean age of all female statistics? students? Assume that we want 95?% confidence that the sample mean is within? one-half year of the population mean. Does it seem reasonable to assume that the ages of female statistics students have less variation than ages of females in the general? population?
An emergency program set up by the state. approximate the probability that the intersection in question will come under the emergency program at the end of the next year.
if 3 different factor levels show a lot of variation between levels this impliesa a large amount of error within each
Please answer the following: Prove that the square of an even number is even. Make sure to show all steps required.
the national sporting goods association conducted a survey of persons 7 years of age or older about participation in
Use the average response plots to determine the existence of possible interactions B× E and C× F. What are the optimal settings of the design parameters using Taguchi's parameter design approach?
Should the shipment be accepted? Use a .02 level of significance and the confidence interval approach to justify your answer.
Is there any evidence to suggest that the mean time to finish this triathlon was more than 2.5 hours? Assume the underlying distribution is normal and use a 5 0.01.
for the population of people who suffer occasionally from migraine headaches suppose that p 0.60 is the proportion
Use the expected value approach to decide whether to market the new product. Because of the high dollar values involved, especially the possibility of a $100,000 loss.
Oil spills 2006. Data from the International Tanker Owners Pollution Federation Limited (www.itopf.com) give the cause of spillage for 312 large oil tanker.
Test whether there is difference in the proportion of viewers using Chi square test.
now that you are familiar with the basic concepts of statistics what are some examples of when you have seen or heard
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