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Explain why comparing children whose parents chose a Montessori school with children of other parents would not show whether Montessori schools perform better than other programs?
Construct the 95% confidence interval estimate of the mean number of migraine attacks for those treated with acupuncture.
The sums of squares were computed as SSW = 4773.3 and SSA = 591.2. Use the F test of ANOVA (assume α = 0.05) to decide whether or not there are any differences in true average lumen outputs between the three brands for this type of light bulb.
P-value for test statistic is .085, determine the minimum level of significance needed to reject null hypothesis?
Which statistical analysis technique should be used? What is the null hypothesis? Can an analysis be performed? Why or why not?
Three times each year, the procurement manager at Phoenix contacts National\'s marketing department to place a monthly order for each of the coming four months.
A sample of 60 smokers has a mean cotinine level of 125. Assuming that sigma=25, find the 90% confidence level estimate of the mean cotinine level of all smokers.
Compute the value of z and state your decision regarding the null hypothesis.
Develop a mathematical programming model and solve. Discuss your results [total profits, total costs, etc].
Do you think that these types of statistics can ever be accurate? How could this statistic be biased? In what ways could scientists misinterpret the results of their studies and come up with an incorrect statistic? What are your thoughts?
What is the probability that of today's 1,000 callers at least 5 received a busy signal? Use the poisson approximation to the binomial. (Round your answer to 4 decimal places.)
Choose a product you are familiar with as a consumer. Answer the following. What type of demand patterns would that product have - cyclical, secular, seasonal, etc. or a combination of several types? Explain.
The random variable x is known to be uniformly distributed between 70 and 90. The probability of x having a value between 80 to 95 is
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