How do you solve these questions

3. Given a data set of all positive 6. In testing a certain kind of missile, target accuracy is measured by the average values, if the largest value of a data distance X (from the target) at which the missile explodes. The distance X is measured in set is doubled, which of the miles and the sampling distribution of X is given by: following is not true? X 0 10 50 100 a) The mean increases. P(X) 1/40 1/20 1/10 33/40 b) The range increases. c) The interquartile range increases. Calculate the variance of this sampling distribution. d) The standard deviation increases. a) 88.0 b) 253.7 c) 761.0 4. Given a data set consisting d) 27.6 of 33 unique whole number e) 5138.7 observations, its five-number f) None of the above summary is: [14,27,39,50,65] How many observations are less than 39? a) 17 b) 16 c) 38 d) 15 5. Given the following sampling distribution: X -20 -10 -7 6 15 P(X) 125 1/20 2/25 7/100 What is the mean of this sampling distribution? a) -0.6 b) 10.2 c) 10.0 d) 9.9 e) -3.2