Question: What is the shape of the sampling distribution of p 1
What is the shape of the sampling distribution of p̂1 – p̂2 for two large samples? What are the mean and standard deviation of this sampling distribution?
Answer to relevant QuestionsRefer to the information given in Exercise 10.4. Test at a 1% significance level if the two population means are different. n1 = 650 1 = 1.05 σ1 = 5.22 n2 = 675 2 = 1.54 σ1 = 6.80 Refer to the information given in Exercise 10.60. Test at a 1% significance level if p1 is less than p2. n1 = 300, p̂1 = 55, n2 = 200, p̂2 = .62 According to Pew Research Center surveys, 79% of U.S. adults were using the Internet in January 2011 and 83% were using it in January 2012 (USA TODAY, January 26, 2012). Suppose that these percentages are based on random ...An economist was interested in studying the impact of the recession on dining out, including drive thru meals at fast food restaurants. A random sample of forty-eight families of four with discretionary incomes between $300 ...The owner of a mosquito-infested fishing camp in Alaska wants to test the effectiveness of two rival brands of mosquito repellents, X and Y. During the first month of the season, eight people are chosen at random from those ...
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