At the end of 1990, 1991, and 1992, the average prices of a share of stock in a portfolio were $34.83, $34.65, and $31.26 respectively. to investigate the average share price at the end of 1993, a random sample of 30 stocks was drawn and their closing prices on the last trading day of 1993 were observed with a mean of 33.583 and a standard deviation of 19.149. estimate the average price of a share of stock in the portfolio at the end of 1993 with a 90 percent confidence interval.

The quinoa seed is in high demand in wealthier countries such as the u.s. and japan. approximately 97% of all quinoa production comes from small farmers in bolivia and peru who farm at high elevations—8,000 feet or higher. the seed is considered highly nutritious. mostly grown and harvested in bolivia and peru, and sold to markets in other countries, the seed is now considered an important for these nations. the governments of bolivia and peru are hopeful that this product will increase the quality of life of their farmers.