Probable to purchase a product

Reference no: EM1316854

Q1) You interview random sample of 50 adults. Results of survey show that 48% of adults said they were more likely to purchase a product when there are free samples. At a = 0.05, can you reject claim that at least 52% of adults are more probable to purchase a product when there are free samples?

Q2) Medical researcher evaluates that no more than 55% of U.S. adults eat breakfast every day. In random sample of 250 U.S. adults, 56.4% say they eat breakfast every day. At α = 0.01 is there sufficient evidence to reject the researcher's claim?

Q3) Car company says that mean gas mileage for its luxury sedan is at least 21 miles per gallon (mpg).You think claim is wrong and determine that random sample of 5 cars has a mean gas mileage of 19 mpg and standard deviation of 4 mpg. Suppose gas mileage of all of company's luxury sedans is normally distributed. At α = 0.05, test company's claim.

Reference no: EM1316854

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