A smart meter tracks household electricity use and the time of use. With smart meters, consumers have a price incentive to use electricity at off-peak hours, when rates are cheaper. After having smart meters described to them, a survey asked 2,400 Canadians about their interest level in having a smart meter installed. At the 5% level of significance, is there evidence that fewer than one-quarter of all Canadians are extremely interested or very interested in having smart meters installed in their homes?
Answer to relevant QuestionsLynda Parks has surveyed a random sample of the customers who shop at the drugstore she owns. Is there evidence that the average purchase amount is more than $25? Use a 5% level of significance. The survey of drugstore customers also collected data on speed of service. At the 3% level of significance, is there evidence that more than 40% of customers rate the service as good or excellent? An online retailer believes that Canadian Internet users spend an average of $725 shopping online annually. A survey of 2,711 Canadian Internet users reports average spending of $641, with a standard deviation of $234. You ...A student wants to estimate the average mark on a statistics test to within 5 marks (out of 100), with 95% confidence. A preliminary sample yielded a standard deviation of 15.54. How big a sample size is necessary? A random sample of 25 families leaving a supermarket yields an average grocery bill of $112.36, with a standard deviation of $32.45. A histogram of the data is approximately normal. Construct a 95% confidence interval for ...
Post your question