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chapter 8-2

# chapter 8-2 - the state education commission wants to...

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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 313 tankers is drawn. Of these ships, 251 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 251 62 313 0.198083 suppose a sample of 313 tankers is drawn. Of these ships 251 Using the data, construct the 98 confidence level or 1-a 0.98 sample porption or p.hat 0.1980830671 a 0.02 a/2 0.01 1-a/2 0.99 normsinv(1-a/2) 2.326347874 p.hat (z)* sqrt(p.hat*((1-p.hat)/n) total/answer low 0.1980830671 0.052407188 0.145676 high 0.1980830671 0.052407188 0.25049 suppose a sample of 1875 floppy disks is drawn. Of these disks 281 Using the data, estimate the proportion of defective. x n p-hat 281 1875 0.1498666667 suppose a sample of 1875 floppy disks is drawn. Of these disks 281 Using the data, construct the 99 confidence level or 1-a

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chapter 8-2 - the state education commission wants to...

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