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Explain the difference between the standard deviation of the sampling distribution of the mean and the standard error of the mean. Explain which one is more likely to be used in practice and why.
Write down a paragraph about the normal distribution. In the paragraph give an example of a distribution that you would judge to be nearly normal and explain why you have made that conclusion.
Using the six-step critical value approach, at the 0.05 level of significance, is there evidence that the population mean delivery time has been reduced below the previous population mean value of 25 minutes?
Did every telephone number that could occur in that community have an equal chance of being generated?- Did this method of generating telephone numbers result in a simple random sample (SRS) of local residences? Explain.
In the last municipal election, a sample of 350 registered voters showed that 85 voted for the incumbants. Find out a 98% confidence interval estimate for the proportion of all voters voting for the incumbants.
as the population ages there is increasing concern about the accident-related injuries to the elderly. the article age
Select an issue, opportunity, or problem facing your organization. Write a 900- to 1,050-word paper that addresses the following questions:
a city ballot includes a local initiative that would legalize gambling. the issue is hotly contested and two groups
Suppose the customer considers a batch with 3% defectives acceptable. - What is the producer's risk for this sampling plan?
Assuming normal populations with equal standard deviations, and using the 0.10 level, is there a significant difference between the two routes? Construct and interpret the 90% confidence interval for the difference between the population means.
(a) Construct a stem-and-leaf display and interpret. (b) Construct a frequency histogram and interpret. (c) Construct a pie chart and interpret.
Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean (to 2 decimals).
Determine change in average number of weekly viewers from to?
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