An educator wants to construct a 98% confidence interval for the proportion of elementary schoolchildren in Colorado who areproficient in reading.i. The results of a recent statewide test suggested that the proportion is 0.65. Using this estimate, what sample size is needed so thatthe confidence interval will have a margin of error of 0.04?ii. Estimate the sample size needed if no estimate of p is available.O i. 770ii. 846O i. 547ii. 601O i. 944ii. 1037O i. 385ii. 423 A sample of size n = 45 has mean x = 10.5 and standard deviation s = 14.3.i. Construct a 99% confidence interval for u.ii. Estimate the sample size needed so that a 99% confidenceinterval for u will have a margin of error equal to 2.5.O i. 4.4 μ< 16.6 [Tech:4.5 < μ< 16.1]ii. 217O i. 4.4 μ< 16.6 [Tech:4.5 < μ< 16.1]ii. 218O i. 4.7 << 16.3 [Tech:4.8 μ< 16.2]ii. 217O i. 4.7 < μ< 16.3 [Tech:4.8 < μ< 16.2]ii. 218

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A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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