Question: The manager of a college coffee shop believes that members
The manager of a college coffee shop believes that members of the college community spend an average of about $6 a week on morning coffees. You conduct a random sample of the college community, and find that the data on weekly spending for morning coffees are approximately normally distributed. You construct a 99% confidence interval estimate of ($3.24, $5.76). What does this tell you about the manager's claim?
Answer to relevant QuestionsReturn to the confidence interval you constructed for Develop Your Skills 8.2, Exercise 9.You believe that the average mark on the statistics test was 50%. Does the sample evidence support your belief? What level of ...A random sample of monthly daycare costs for 50 households in Halifax, Nova Scotia, yields an average of $460, with a standard deviation of $65. Estimate the average monthly daycare costs for all Halifax households, with 98% ...A college wants to estimate the proportion of its students who live at home with their parents. How large a sample size should be taken if the desire is to estimate the proportion to within 3%, with 98% confidence? Past ...The confidence interval created in Exercise 20 is quite wide. How large a sample would be necessary if the company wanted to estimate the percentage of its accounts receivable that were 0 to 30 days old to within 5%, with ...The foreman in a small assembly plant believes that playing classical music in the plant will improve worker productivity. To try to prove his point, the foreman conducts an experiment. He records the average daily ...
Post your question