I accidentally dropped a jar of lentils and a jar of sugar to the ground. Even though the jars did not break, the lids came loose, and the lentils and sugar scattered all over the floor and got mixed! I scooped up the lentil and sugar mix from the ground and am now planning to separate them. Use the techniques you have learned in this experiment to design a procedure I should use to separate the lentils from the sugar.

The chemical composition of soil varies with depth. an article in communications in soil science and plant analysis describes chemical analyses of soil taken from a farm in western australia. fifty specimens were each taken at depths 50 and 250 cm. at a depth of 50 cm, the average no3 concentration (in mg/l) was 88.5 with a standard deviation of 49.4. at a depth of 250 cm, the average concentration was 110.6 with a standard deviation of 51.5. find a 95% confidence interval for the difference in no3 concentrations at the two depths.