Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN: 9780079039897
Author: Carter
Publisher: McGraw Hill
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- A manufacturer bonds a plastic coating to a metal surface. A random sample of nine observations on the thickness of this coating is taken from a week's output and the thickness (in millimeters) of these observations are shown below. Assuming normality, find a 90% confidence interval for the population variance. 19.2 21.3 18.8 20.4 21.1 Find the 90% confidence interval. <²<0 (Round to four decimal places as needed.) 19.4 Click the icon to view a table of lower critical values for the chi-square distribution. Click the icon to view a table of upper critical values for the chi-square distribution. KEER 19.2 20.7 20.5 D
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Transcribed Image Text:- A manufacturer bonds a plastic coating to a metal surface. A random sample of nine observations on the thickness of this coating is taken from a week's output and the thickness (in millimeters) of these observations are shown below. Assuming normality, find a 90% confidence interval for the population variance. 19.2 21.3 18.8 20.4 21.1 Find the 90% confidence interval. <²<0 (Round to four decimal places as needed.) 19.4 Click the icon to view a table of lower critical values for the chi-square distribution. Click the icon to view a table of upper critical values for the chi-square distribution. KEER 19.2 20.7 20.5 D
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Step 2: Calculation of sample variance
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Step 3: Calculation of critical values
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Step 4: Calculation of confidence interval
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Glencoe Algebra 1, Student Edition, 9780079039897...
Algebra
ISBN:9780079039897
Author:Carter
Publisher:McGraw Hill
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