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The relationship between the amount of remaining carbon monoxide (CO) in an individual’s lungs and the...

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Statistics

The relationship between the amount of remaining carbon monoxide(CO) in an individual’s lungs and the time since that person lastsmoked a cigarette can be summarized using a linear regressionapproach.

Write down a simple linear regression model and the underlyingassumptions. The following summary data was collected from 12different smokers.

x = time since last smoked a cigarette (hours) y = amount of COin ppm

n=12, x=1.88 sxx =25.8, syy =1805 SSE=877.4 Fitted regressionline: ?̂ = ??. ?? − ?. ??? ?

(k) What is the residual at ?0 = 2.25 if the correspondingobserved amount CO is

28ppm

(l) Estimate the mean amount of CO in the lungs for an elapsedtime of 2.25 hours.

(m) Construct a 95% confidence interval for the true mean amountof CO in the lungs

for an elapsed time of 2.25 hours.

Please show all work.

Answer & Explanation Solved by verified expert
4.3 Ratings (956 Votes)
Answer K residual 2831679 36790 L Y 451700 59960 225 31679 M X Value 225 Confidence Level 95 Sample    See Answer
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