QUESTION 7 1.9 points Save Answer The labor relations manager of a large corpora

Question

QUESTION 7 1.9 points Save Answer The labor relations manager of a large corporation wished to study the absenteeism among workers at the company's central office during the last year. a random sample of 25 workers revealed the following: an average of 9.7 days, a standard deviation of 4.0 days; and 12 employees were absent more than 10 days. In estimating the 95% confidence interval estimate of the proportion of workers absent more than 10 days last year what is the upper limit of the confidence interval? .516 6445 284 0676

Explanation / Answer

here estimated proportion =phat =12/25 =0.48

for std error =(phat*(1-phat)/n)1/2 =0.010

for 95% CI ; zscore =1.96

therefore upper limit of confidence interval =estimated proportion +z*std error =0.48+1.96*0.10 =0.676

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