The stock market in Mexico reported strong returns in 2012. The population of stocks earned a mean

Question:

The stock market in Mexico reported strong returns in 2012. The population of earned a mean return of 17.87% in 2012. (Data extracted from asxiq.com/blog/stock-markets-in the world-returns-in-2012/.) Assume that the returns for on the Mexican stock market were distributed as a normal random variable, with a mean of 17.87 and a standard deviation of 20. If you selected a random sample of 16 from this population, what is the probability that the sample would have a mean return.
a. less than 0 (i.e., a loss)?
b. between -10 and 10?
c. greater than 10?
Stocks
Stocks or shares are generally equity instruments that provide the largest source of raising funds in any public or private listed company's. The instruments are issued on a stock exchange from where a large number of general public who are willing...