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Suppose you are tutoring a student next semester and they ask you to explain the tradeoffs between P (Type I error), P (Type II error), significance level, confidence level, alpha, length of confidence interval, power, and sample size. Put together a 1-page "study sheet" to help them understand the concepts. Use whatever format you prefer - paragraphs, bullet points, figures, etc... You will be graded on accuracy, completeness (addressing each point above), and effectiveness (utility, ease of reading).
A study group of long distance phone calls made from the corporate offices of Pepsi Bottling Group, Inc., in Somers, New York, revealed the length of the calls, in minutes, follows normal probability distribution.
The Type 1 error states the probability of being wrong whenever:
What control limits should be applied to his sample?
Create a scatter diagram and consider the correlation for the given data. Create a scatter diagram and sketch the line you think best fits the data.
Compute a 95% confidence interval for the population proportion of positive drug tests. Explain why is the normality assumption not a problem despite the very small value of p.
Eighty-eight shoppers were interviewed at random, and 59 said that they prefer to shop alone.
Construct a 95% confidence interval for the average amount its credit card customers spent on their first visit to the chain's new store in the mall assuming that the amount spent follows a normal distribution.
Draw a tree diagram representing this experiment. Use this tree diagram to find the probabilities below.
Conduct a hypothesis test using H 0 : σ 2 = .009216 to see whether the sample data indicate that the variability in interest rates changed.
What is the probability that both defective lights will be found within three trials?
What does null hypothesis for repeated-measures hypothesis test state?
Determine relative frequency of X=4? Generate the cumulative frequencies.
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