A manager would like to estimate the average amount spent by a couple for dinner at his restaurant. A random sample of 30 couples provided a sample mean per couple of $78.25. Assume that the population standard deviation per couple is $22.50. Compute and explain a 95% confidence interval estimate of the population mean. show work.

Over the past decade, brands that were once available only to the wealthy have created more affordable product extensions, giving a far broader range of consumers a taste of the good life. jaguar, for instance, launched its x-type sedan, which starts at $30,000 and is meant for the "almost rich" consumer who aspires to live in luxury. by marketing to people who desire a luxurious lifestyle, jaguar is using: