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A statistician selected a sample of 16 accounts receivable and determined the mean of the sample to be $5,000 with a standard deviation of $400. He reported that the sample information indicated the mean of the population ranges from $4,739.80 to $5,260.20. He neglected to report what confidence coefficient he had used. Based on the above information, determine the confidence coefficient that was used. Assume the population has a normal distribution.
If 50 different homes are randomly selected, find the probability that their mean energy consumption level for September is greater than 1075 KWh.
question a randomized controlled trial is run to evaluate the effectiveness of a new drug for asthma in children. a
Let S be a random variable (not necessarily positive). Prove using Markov's inequality that for every p>0 and for every constant q,
Draw the suitable distribution, and locate critical regions for α = .05. Compute test statistics (z score) for the sample.
a supervisor in the department of rehabilitive services is critical of the performance of one of her counselors. the
question an insurance company expects 10 of its policyholders to collect claims of 400 this year and the remaining 90
you are required to provide a portfolio of 3000 words comprising two equal elements as followspart onethis will
Using six-step critical value approach, at the 0.05 level of significance, is there evidence that population mean delivery time has been increased below previous population mean value of 25 minutes?
a consumer organization estimates that over a 1 year period 18 of cars will need to be repaired once 7 will need to be
Categorize the following as discrete or continuous random variables.
Differentiate between the levels of measurement by providing an example of data which can be transformed from one level of measurement to another and another example of data that cannot be transformed.
Which of the following would produce a new confidence interval with smaller width based on these same data and produce a new confidence interval
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