Question: 24 A 95 confidence interval for the mean lead concentration in the urine of adult men working with lead for smelting is 8 22 to

24 A 95 confidence interval for the mean lead concentration in the urine of adult men working with lead for smelting is 8 22 to 11 98 micrograms per liter g l The numerical value of the margin of error for this confidence interval is 118 1

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