Statistics gathered on delay at a machine on 196 different (and assumedindependent) days yielded a sample mean of 3.0 min and a sample standarddeviation of 1.4 min.(a) Construct a 95% confidence interval for the average delay.(b) Approximately how many more days of observations would be needed tomake the size of the confidence interval around +0.1 min?

a) Given information, n=196 x¯=3s=1.4 95% confidence interval for the average delay:…

Answered: Statistics gathered on delay at a…

A First Course in Probability (10th Edition)

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Chapter1: Combinatorial Analysis

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Statistics gathered on delay at a machine on 196 different (and assumed independent) days yielded a sample mean of 3.0 min and a sample standard deviation of 1.4 min. (a) Construct a 95% confidence interval for the average delay.