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A-sample-of-20-cigarettes-is-tested-to-determine-nicotine-vomtent-and-the-average-value-observed-was-1-2mg-Compute-a-99-percentage-two-sided-confidence-interval-or-the-mean-nicotine-content-if-it-is-k




Question Number 59099 by Huygens last updated on 04/May/19
A sample of 20 cigarettes is tested to determine nicotine vomtent  and the average value observed was 1.2mg.Compute  a 99 percentage two−sided confidence interval  or the mean nicotine content if it is known that the standard deviation of a cigarette′s   nicotine content is 0.2mg.
$${A}\:{sample}\:{of}\:\mathrm{20}\:{cigarettes}\:{is}\:{tested}\:{to}\:{determine}\:{nicotine}\:{vomtent} \\ $$$${and}\:{the}\:{average}\:{value}\:{observed}\:{was}\:\mathrm{1}.\mathrm{2}{mg}.{Compute} \\ $$$${a}\:\mathrm{99}\:{percentage}\:{two}−{sided}\:{confidence}\:{interval} \\ $$$${or}\:{the}\:{mean}\:{nicotine}\:{content}\:{if}\:{it}\:{is}\:{known}\:{that}\:{the}\:{standard}\:{deviation}\:{of}\:{a}\:{cigarette}'{s}\: \\ $$$${nicotine}\:{content}\:{is}\:\mathrm{0}.\mathrm{2}{mg}. \\ $$

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