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In illinois a random sample of 85 eighth grade students have a mean score of 265 with standard deviation of 55 on the national mathematics assessment test. Result prompts are school administration to decide the mean score for the states eith graders on the examination is more than 260. At alpha equals 0.04 is there enough evidence to support the clim?Whats the claim mathematically and identify Ho and Ha.Find sd test stat 2 and its corresponding areaFind the p-valueDecide wether to reject or fail to reject HoInterpret decision in the contest of the original claim.
Once production is set up, 80 units can be produced per day. Daily demand rate for the units is 60 per day. a. What is the most economical number to produce per production run? b. How long is each production cycle?
What advantage does correlation have over a cross-tab?
State the null and alternative hypotheses you would use to test whether the year-end bonuses paid by Jones & Ryan were different from the population mean.
Appalachian Coal mining believes it can enhance labor productivity and therefore net revenue by reducing air pollution in its mines. It estimates that the marginal cost function for reducing pollution by installing additional capital equipment is.
If the population is normally distributed then the sample mean is also normally distributed even for small sample size.
Composite functions are useful when one quantity depends on a second quantity, and in turn that second quantity depends on a third quantity. This is an extremely general situation with lots of real-world applications.
The means appear to be very close, but not the variances. At α = .05, is there a difference in variances? Show all steps clearly, including an illustration of the decision rule.
About 40% of the general population donate time and energy to community projects. Suppose 15 people have been randomly selected from a community and each asked whether he or she donates time and energy to community projects.
Which is the estimated or dear proportion of defective cups in the population?
Construct a 95 percent confidence interval for the true mean.
Develop a joint probability table for these data. If a student goes full time, determine the probability that school quality is first reason for selecting a school?
What proportion of time will it take clean-up crew 56 or more hours for cleaning plant? Define the lower and upper limits of interval.
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