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Consider the following population data values. 11 12 42 1 kno16 19 6 30 13 18 a) Calculate the range. b) Calculate the variance. c) Calculate the standard deviation. c) Determine the mode. a) The range is . (Type an integer or a decimal.) b) The population variance is (Type an integer or decimal rounded to two decimal places as needed.) c) The population standard deviation is. (Type an integer or decimal rounded to two decimal places as needed.) c) Determine the mode(s). Select the Big isthe data eval of meas The mode(s) is(are) (Liso a comma to separate an