Charles has a collection of 240 microgroove records. Toestimate the average playing time of his records, he takesa sample of 50 of his records without replacement and findsan average playing time of 42.3 minutes with a samplingstandard deviation s = 1.6 minutes. Construct a confidenceinterval at the 99% confidence level to estimate theaverage playing time of Charles’ records.

Charles has a collection of 240 microgroove records. Toestimate the average playing time of his records, he takesa sample of 50 of his records without replacement and findsan average playing time of 42.3 minutes with a samplingstandard deviation s = 1.6 minutes. Construct a confidenceinterval at the 99% confidence level to estimate theaverage playing time of Charles’ records.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.3: Measures Of Spread

Problem 1GP

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Question

Charles has a collection of 240 microgroove records. To
estimate the average playing time of his records, he takes
a sample of 50 of his records without replacement and finds
an average playing time of 42.3 minutes with a sampling
standard deviation s = 1.6 minutes. Construct a confidence
interval at the 99% confidence level to estimate the
average playing time of Charles’ records.

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