1. The yield of a chemical process is being studied. From previous experience, yield is known to be normally distributed and σ = 3. The past 5 days of plant operation have resulted in the following percent yields: 91.6, 88.75, 90.8, 89.95, and 91.3. Find a 95% two-sided confidence interval on the true mean yield.   2. A research engineer for a tire manufacturer is investigating tire life for a new rubber compound and has built 16 tires and tested them to end-of-life in a road test. The sample mean and standard deviation are 60,139.7 and 3645.94 kilometers. Find a 95% confidence interval on mean tire life

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
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Chapter10: Statistics
Section10.1: Measures Of Center
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1. The yield of a chemical process is being studied. From previous experience, yield is known to be normally

distributed and σ = 3. The past 5 days of plant operation have

resulted in the following percent yields: 91.6, 88.75, 90.8, 89.95,

and 91.3. Find a 95% two-sided confidence interval on the true

mean yield.

 

2. A research engineer for a tire manufacturer is investigating

tire life for a new rubber compound and has built 16 tires and

tested them to end-of-life in a road test. The sample mean and

standard deviation are 60,139.7 and 3645.94 kilometers. Find a

95% confidence interval on mean tire life

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