Chemical Purity A chemical manufacturerclaims that the purity of his product never
Chapter 10, Problem 102(choose chapter or problem)
Chemical Purity A chemical manufacturerclaims that the purity of his product never variesby more than 2%. Five batches were tested andgiven purity readings of 98.2, 97.1, 98.9, 97.7, and97.9%.a. Do the data provide sufficient evidence to contradictthe manufacturers claim? (HINT: To be generous,let a range of 2% equal 4s.)b. Find a 90% confidence interval for s2
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