The average price of homes sold in the u. s. in 2012 was μ = $240,000. a sample of 144 homes sold in chattanooga in 2012 showed an average price of $246,000. the population standard deviation (σ) is known to be $36,000. we are interested in determining whether or not the average price of homes sold in chattanooga is significantly more than the national average. question: what sampling distribution should be used to test whether the chattanooga sample mean is significantly higher than the national average?

Mcdonald's fast-food restaurants have a well-designed training program for all new employees. each new employee is supposed to learn how to perform standardized tasks required to maintain mcdonald's service quality. due to labor shortages in some areas, new employees begin work as soon as they are hired and do not receive any off-the-job training. this nonconformity to standards creates

Stocks a, b, and c are similar in some respects: each has an expected return of 10% and a standard deviation of 25%. stocks a and b have returns that are independent of one another; i. e., their correlation coefficient, r, equals zero. stocks a and c have returns that are negatively correlated with one another; i. e., r is less than 0. portfolio ab is a portfolio with half of its money invested in stock a and half in stock b. portfolio ac is a portfolio with half of its money invested in stock a and half invested in stock c. which of the following statements is correct? a. portfolio ab has a standard deviation that is greater than 25%.b. portfolio ac has an expected return that is less than 10%.c. portfolio ac has a standard deviation that is less than 25%.d. portfolio ab has a standard deviation that is equal to 25%.e. portfolio ac has an expected return that is greater than 25%.

Suppose portugal has 700 workers and 26,000 units of capital, and france has 18,000 workers and 700 units of capital. technology is identical in both countries. assume that wine is the capital-intensive good and cloth is the labor-intensive good. which of the following statements is correct if the nations start trading with each other? a) wages will increase in portugal. b) rental rates in france will increase. c) wages in france will decrease. d) rental rates in portugal will increase.