Question: A recent Associated Press report stated that 30 of dentists
A recent Associated Press report stated that 30% of dentists nationwide have experienced declining revenues during the past 5 years. You survey a random sample of 100 Indiana dentists and find that 24 of those surveyed report declining revenues. Is this sufficient sample evidence to reject a null hypothesis that the proportion of dentists in Indiana who have experienced declining revenues is the same as the national proportion of .30? Use a significance level of 5%.
Answer to relevant QuestionsYour cousin Howard claims to have ESP powers. More specifically, he claims that he can predict, with uncanny accuracy, the outcome of a coin toss. He has you toss a coin 100 times and correctly predicts the outcome of the ...Almonte, Inc., a maker of low-priced hair care products, claims that its hair spray lasts as long as the industry leader’s higher priced product. You take a sample of 60 applications of Almonte’s hair spray and 60 ...A random sample of six salespeople from Mandalay Cellular is given a test of basic selling skills. Test scores for the sample are given below: A sample of five salespeople from Gallant Communications is also tested, with the ...Turbo Deliveries claims that its record of ontime package delivery is superior to that of its nearest competitor, Sloan Transport. Selecting a random sample of 120 Turbo deliveries and 120 Sloan deliveries, you find that 84 ...It has been reported that 60% of the American public believe that global warming is occurring and that it is largely caused by human activity. You take a random sample of 200 high school students in your local area and find ...
Post your question