On a late-night infomercial, a new dealer of pre-packaged diet meals and non-FDA approved diet supplements promises viewers that they will lose an average of at least 20 pounds in just six weeks (individual results may vary). A consumer watchdog who watches too much late-night TV wants to dispute this claim. She digs up a random sample of 16 wannabe weight losers who have used these products for six weeks. The number of pounds lost by each of these people is as follows: 18 19 22 17 15 23 18 19 19 17 20 18 19 22 17 18 Upon consulting a nutritional expert, she also receives assurance that it is reasonable to assume σ = 2.4 for the population of consumers of this supplement. State carefully the conclusion you would reach at the 1% level of significance?
On a late-night infomercial, a new dealer of pre-packaged diet meals and non-FDA approved diet supplements promises viewers that they will lose an average of at least 20 pounds in just six weeks (individual results may vary). A consumer watchdog who watches too much late-night TV wants to dispute this claim. She digs up a random sample of 16 wannabe weight losers who have used these products for six weeks. The number of pounds lost by each of these people is as follows: 18 19 22 17 15 23 18 19 19 17 20 18 19 22 17 18 Upon consulting a nutritional expert, she also receives assurance that it is reasonable to assume σ = 2.4 for the population of consumers of this supplement.
State carefully the conclusion you would reach at the 1% level of significance?
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