A random sample of n 5 30 is drawn from a population that is normally distributed, and the sample variance is s2 = 41.5. Use α = 0.05 in testing H0: σ2 = 29.0 versus H1: σ2 ≠ 29.0.
Answer to relevant QuestionsFor df = 5 and the constant A, identify the value of A such that a. P(x2 > A) = 0.90 b. P(x2 > A) = 0.10 c. P(x2 > A) = 0.95 d. P(x2 > A) = 0.05 e. P(x2 < A) = 0.975 f. P(x2 < A) = 0.025 The personnel director of a large firm has summarized a random sample of last year’s absentee reports in the accompanying contingency table. At the 0.01 level of significance, test the independence of age versus length of ...A national public television network has found that 35% of its contributions are for less than $20, with 45% for $20–$50, and 20% for more than $50. In a random sample of 200 of the contributions to a local station, 42% ...Over the past year, an audio store has sold stereo systems produced by three different manufacturers. Of the 400 units from company A, 12% were returned for service during the warranty period. This compares to 15% of 300 ...Researchers have coded a random sample of households according to household income (1 = under $30,000, 2 = $30,000–$49,999, 3 = $50,000–$69,999, and 4 = $70,000 or more) and number of vehicles owned (1 = 0, 2 = 1 or 2, ...
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