Bid cross rate for the real R:B = 25.2513/1.0076 = 25.0608. Ask cross rate for the real R:B =
25.3986/0.9955 = 25.5134. Therefore the direct quotes for the real in Bangkok are R:B = 25.0608 - 5134.

As a rule of thumb, two standard deviations produce a 95% confidence level. Since this question presents a one-tailed test, the probability of falling below the expected value by two standard deviations is 2.5%. Confidence interval = (19% - 10%)/4.5% = 2 standard deviations The frequency of outcomes two standard deviations less than the expected return is 2.28%. Hence, Probability of keeping the account = 1.0000 - 0.0228 = 0.9772, closest to 0.975.

In the weak form, asset prices fully reflect all market data, which refers to all past price and trading volume information.

Most indices are price return indices.

According to the central limit theorem, the sample mean has a standard deviation of
1/2 1/2
SDPop/n , where n is the sample size. In this case, standard error = 15/35 = 2.54.