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Suppose that the cost of a statistics text was $55 in 1985 and is $90 in 2000. What is the 'statistics text index' number, rounded to the nearest tenth, for the 1985 edition with the 2000 price as the reference value?
suppose that the annual rate of return for a common biotechnology stock is normally distributed with a mean of 5 and a
Is the difference in mean scores large enough to be important? (d) Is it reasonable to assume equal variances? (e) Carry out a formal test for equal variances at α = .05, showing all steps clearly.
Surveys of political opinion typically use a quota sample of 1000 voters with a new sample being selected each time. In the period before a general election, some organizations use panels. Suggest reasons for using a panel in preference to the mor..
What is the mean number among 12 truthful persons who will be classied as deceptive? What is the standard deviation of this number?
Define reliability. Explain its role in quality control and improvement.- Describe the life cycle of a product. What probability distributions would you use to model each phase?
How do I find T, S and B multiples if g=2,5,and 10 pairwise comparisons are to be made with a 95 percent family confidence coefficient
a researcher testing the effects of two treatments for anxiety computed a 95 confidence interval for the difference
What is the probability that the Wildcats win the series in exactly 3 games? What is the probability that the Bears win the series in exactly 4 games?
When designing a study to determine this population proportion, what is the minimum number you would need to survey to be 95% confident
a) What is the mass of boiling water we need to melt all ice? b) What is the nal temperature if we mix the ice from the freezer with 5kg of boiling water?
A spinner is used for which it is equally probable that the pointer will land on any one of six regions. Three regions are colored red, two are colored green and one is colored yellow. If the pointer is spun twice, find probability it will land on..
What is the PERCENTAGE of students who received a score of AT LEAST 82 on this exam?
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