10.00 points Exercise 8-51 Algo An accounting professor is notorious for being s

Question

10.00 points Exercise 8-51 Algo An accounting professor is notorious for being stingy in giving out good letter grades. In a large section of 170 students in the fall semester, she gave out only 2% As, 18% Bs, 35% Cs, and 45% Ds and Fs. Assuming that this was a representative class, compute the 85% confidence interval of the probability of getting at least a B from this professor. Use Table 1. (Round intermediate calculations to 4 decimal places. Round "z-value" and final answers to 3 decimal places.) Confidence interval to References eBook & Resources Worksheet Exercise 8-51 Algo MacBook 0 F3 2 3 4 5 6

Explanation / Answer

n 170 p 0.35 z-value of 85% CI 1.4395 SE = sqrt(p*(1-p)/n) 0.03658 ME = z*SE 0.05266 Lower Limit = p - ME 0.29734 Upper Limit = p + ME 0.40266 85% CI (0.2973 , 0.4027 )

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