According to an article in Travel & Leisure, an average plot of land in Spain's San Martin wine-producing region yields 600 bottles of wine each year. Assume this average is based on a random sample of 25 plots and that the sample standard deviation is 100 bottles. Give a 95% confidence interval for the population average number of bottles per plot.
Answer to relevant QuestionsThe data on the daily consumption of fuel by a delivery truck, in gallons, recorded during 25 randomly selected working days, are as follows: 9.7, 8.9, 9.7, 10.9, 10.3, 10.1, 10.7, 10.6, 10.4, 10.6, 11.6, 11.7, 9.7, 9.7, ...The makers of a medicated facial skin cream are interested in determining the percentage of people in a given age group who may benefit from the ointment. A random sample of 68 people results in 42 successful treatments. ...Before launching its Buyers' Assurance Program, American Express wanted to estimate the proportion of cardholders who would be interested in this automatic insurance coverage plan. A random sample of 250 American Express ...In problem 6–21, give a 99% confidence interval for the variance of the number of miles that may be driven on a tire. In problem A tire manufacturer wants to estimate the average number of miles that may be driven on a ...A company believes its market share is about 14%. Find the minimum required sample size for estimating the actual market share to within 5% with 90% confidence.
Post your question