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PbLlU The amount of money.r I spent with some students on a certain dag.r 1was as follows Money 150-250 250-350 350-450 450-550 550-650 650-?50 750-850 850-950 (Class) Standard deviation= Coefficient of variation (cv)=A national random sample of 20 ACT scores from 2010 is listed below. Calculate the sample mean and standard deviationjgl 26.13.23.2325; 1?,22,17,'|9,12,26,30,3l},18,14,12.26.1?,1B O a. 20.85.. 5.94 O b. 20.85.. 5.79 O C; 20.50. 5.94 Q d. 20.50.5319 Questio n8 N at yet answe red Malked out at 3.00 '7 Flag question Edit question Given five items with mass 14 9.17 9.19 g 13 9.18 g 1. What is the median of the masses? [INCLUDE UNITS] U 2. What is the average mass of the items? U 3. What is the geometric mean of the items mass? U 4. What is Harmonic mean of the masses U