(1 point) Periodically, the county Water Department tests the drinking water of homeowners for contminants such as lead

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1 Point Periodically The County Water Department Tests The Drinking Water Of Homeowners For Contminants Such As Lead 1 (77.76 KiB) Viewed 171 times

(1 point) Periodically, the county Water Department tests the drinking water of homeowners for contminants such as lead and copper. The lead and copper levels in water specimens collected in 1998 for a sample of 10 residents of a subdevelopement of the county are shown below. lead (ug/L) copper (mg/L) 1.3 0.575 0.5 0.268 1.2 0.594 0.2 0.265 3.1 0.332 2.6 0.098 3.8 0.491 4.1 0.31 3.9 0.783 1.9 0.131 Assume a normal distribution for both the lead and copper levels. (a) Construct a 99% confidence interval for the mean lead level in water specimans of the subdevelopment. <μ και (b) Construct a 99% confidence interval for the mean copper level in water specimans of the subdevelopment. Sus