Question: A car manufacturer wants to estimate the average miles per gallon highway
A car manufacturer wants to estimate the average miles-per-gallon highway rating for a new model. From experience with similar models, the manufacturer believes the miles-per-gallon standard deviation is 4.6. A random sample of 100 highway runs of the new model yields a sample mean of 32 miles per gallon. Give a 95% confidence interval for the population average miles-per-gallon highway rating.
Relevant QuestionsAccording to an advertisement in Worth, in a survey of 68 multifamily office companies, the average client company had assets of $55.3 million. If this is a result of a random sample and the sample standard deviation was ...Fin Aid is a new, free Web site that helps people obtain information on 180,000 college tuition aid awards. A random sample of 500 such awards revealed that 368 were granted for reasons other than financial need. They were ...A survey of 5,250 business travelers worldwide conducted by OAG Business Travel Lifestyle indicated that 91% of business travelers consider legroom the most important in-flight feature. (Angle of seat recline and food ...You take a random sample of 100 pins from the lot supplied by the vendor and test them. You find 8 of them defective. What is the 95% confidence interval for percentage defective in the lot? According to Money, "3 in 5 executives said they anticipate making a major career change." Suppose a random sample of 1,000 executives shows that 55% said they anticipate making a major career change. Can you reject the ...
Post your question