In a study of water pollution, a sample of mussels was taken and lead concentration (milligrams per gram dry weight) was measured from each one. The following data were obtained: {83, 109,94,83,100,90,111,85,96,84,106,82,101,108,82,83}. What is the standard error of the mean ( SE() SE(x) )? You may use JASP to calculate the measure, S.E. mean. Provide the answer in 3 decimal placess