Answers: 1
Chemistry, 23.06.2019 11:20, bobthebattlebot
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.
Answers: 1
Chemistry, 23.06.2019 13:40, kimjooin02
Match these items with their examples. 1. liquid solution milk 2. solid solution aluminum foil 3. compound soda 4. colloid steel 5. element salt
Answers: 1
Differentiable surface waves from body waves?...
Mathematics, 13.09.2019 00:30
Mathematics, 13.09.2019 00:30
Physics, 13.09.2019 00:30