1. A set of 10 randomly selected measurements is listed in descending order as follows: 7.5, 7.1, 6.8, 5.6, 3.2, 2.5, 2.5, 0.3, 1.2, 1.4 It is known that the sample variance is 11.361 (b) Suppose x1, x2, . . ., x8 is another set of 8 measurements with sample mean 2.4 and sample variance 7.52. Find the mean, variance and standard deviation of the combined set of measurements..