The relationship between confidence interval and hypothesis testing is very close. Do you agree? Explain. Two scanners, Brand A and Brand B, are both designed to detect forged cinema tickets. To determine whether there is a difference in the performance of the two scanners 300 forged tickets were randomly selected and scanned by each. It was found that 197 forgeries were detected by Brand A while Brand B detected 178. Is there a difference in the performance of the two brands of scanners? Explain. A consultant believes that the price of a stock in a stock exchange will grow at a rate of 5% per week with a standard deviation of 1%. An investor believes the stock wont grow as quickly. The changes in the price (%) recorded for 12 consecutive weeks are as follows: 3, 4, 2, 1, 3, 6, 1, 1, 2, 2, 3, 1. Who would you agree? the consultant or the investor? Explain