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Question: When calculating a confidence interval for the population mean with a known population standard deviation σ describe the effects of the following two changes on the confidence interval:
(1) doubling the sample size,
(2) quadrupling (multiplying by 4) the sample size.
Give two reasons why this relationship does not hold true if you are calculating a confidence interval for the population mean with an unknown population standard deviation.
An insurance company states that 90% of its claims are settled within 5 weeks. A consumer group selected a random sample of 100 of the company's claims and found 75 of the claims were settled within 5 weeks.
Schadek Silkscreen Printing, Inc. purchases plastic cups on which to print logos for sporting events, proms, birthdays, and other special occasions. What is the estimated proportion defective in the population?
a medical clinic in a small city in the state of washington wants to estimate the mean serum cholesterol level measured
Discuss the background material leading to the Declaration of Independence. This material breaks down into two areas of ( 1) external and (2) internal factors. Discuss the debate and factors that led to the colonies to finally declare their indep..
A basketball player shoots 8 free throws during a game. If we assume that each attempt has the same probability of success, the sample space for the number of baskets he/she makes during the game is ??
Hamstrings. Exercise discussed an experiment to see if the time it took athletes with hamstring injuries to be able to return to sports was different depending.
This test result prompts a state administrator to declare that the mean score for the sate's eighth graders on the examination is more than 275. at a=.04, is there enough evidence to support the claim.
Why, do you think, Herbert Spencer's idea of "Survival of the Fittest" appealed to many in the middle class at this point? What part did the rapid industrialization and interpretation of the 14th amendment play in this philosophy, if any?
Perform the Jarque-Berra test of normally distributed returns for each of Boeing and IBM Discuss your findings and also explain why do you test normality test
Search for a recent opinion poll dealing with some aspect of security (domestic or international). Make sure to trace the survey back to the original organization. Post in a discussion thread (i.e., on the Week Six discussion board) five questions..
Why would it be important to determine if the researchers assigned the women participating in the study at random to one of the two groups? Explain why you think that the researchers included a control group in this study.
Of the adults in Jefferson County, 10% have had CPR training
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