According to the August 2009 Reader’s Digest article “Where Our Garbage Goes,” the average American tosses 4.6 pounds of garbage every day. A small town in Vermont initiated a Going Green campaign and asked residents to work on recycling more and reducing their generation of garbage each day. To estimate the average amount of trash discarded by people in their town, 18 households were randomly selected and all were asked to carefully weigh their trash on the same day. The average amount for the sample was 3.89 pounds, with a standard deviation of 1.322 pounds. Is there sufficient evidence that the Vermont town now has significantly lower average daily garbage amounts than the average American household? Use a 0.05 level of significance and assume weights are normally distributed.
Answer to relevant QuestionsFind: a. t(12, 0.01) b. t(22, 0.025) c. t(50, 0.10) d. t(8, 0.005) It is claimed that the students at a certain university will score an average of 35 on a given test. Is the claim reasonable if a random sample of test scores from this university yields 33, 42, 38, 37, 30, 42? Complete a ...Acetaminophen is an active ingredient found in more than 600 over-the-counter and prescription medicines, such as pain relievers, cough suppressants, and cold medications. It is safe and effective when used correctly, but ...Find a, the area of one tail, and the confidence coefficients of z that are used with each of the following levels of confidence. a. 1 - a = 0.90 b. 1 - a = 0.95 c. 1 - a = 0.99 In a poll conducted by Harris Interactive of 1179 video-gaming U.S. youngsters, 8.5% displayed behavioral signs that may indicate addiction. Using a 99% confidence interval for the true binomial proportion based on this ...
Post your question