chapter 8-1 - 0.9319727891 a 0.01 a/2 0.005 1-a/2 0.995...

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the state education commission wants to estimate the fraction of the tenth grade students that have students that have reading skills at or below the eighth grade level. suppose a sample of 1217 tankers is drawn. Of these ships, 840 did not have spills. Using the data, estimate the proportion of tenth graders reading at or below the eighth grade level. x n-x n p-hat 840 377 1217 0.309778 suppose a sample of 1217 tankers is drawn. Of these ships 840 Using the data, construct the 99 confidence level or 1-a 0.99 sample porption or p.hat 0.309778143 a 0.01 a/2 0.005 1-a/2 0.995 normsinv(1-a/2) 2.5758293035 p.hat (z)* sqrt(p.hat*((1-p.hat)/n) total/answer low 0.309778143 0.0341422022 0.275636 high 0.309778143 0.0341422022 0.34392 suppose a sample of 441 floppy disks is drawn. Of these disks 411 Using the data, estimate the proportion of defective. x n p-hat 411 441 0.9319727891 suppose a sample of 441 floppy disks is drawn. Of these disks 411 Using the data, construct the 99 confidence level or 1-a 0.99 sample porption or p.hat
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Unformatted text preview: 0.9319727891 a 0.01 a/2 0.005 1-a/2 0.995 normsinv(1-a/2) 2.5758293035 p.hat (z)* sqrt(p.hat*((1-p.hat)/n) total/answer low 0.9319727891 0.0308845113 0.901088 high 0.9319727891 0.0308845113 0.962857 NASA is conducting an experiment to find out the fraction of people who black out at G forces greater than 6 in an earlier study, the population proportion was estimater to be 0.22 how large a sample would be required in order to estimate the fraction of people who black out at 6 or more Gs at the 98 % confidence level with an error at most 0.02 confidence level or 1-a 0.98 sample porption or p.hat 0.22 allowable error 0.02 a 0.02 a/2 0.01 1-a/2 0.99 normsinv(1-a/2) 2.326347874 n= 5.4118944311 0.1716 0.0004 2321.70271092 did not have spills % confidence interval for the proportion of oil tankers that have spills each month were defective . were defective . % confidence interval for the proportion of disks which are defective...
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This document was uploaded on 10/26/2011 for the course QMST 2333 at Texas State.

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