When the calcium level in the blood is too high, the cells of the parathyroids make less parathyroid hormone (or stop making it altogether), thereby allowing calcium levels to decrease. This feed-back mechanism runs constantly, thereby maintaining calcium (and parathyroid hormone) in a very narrow normal range.
Best Answer: The learning outcome is the thing that the children produce in the lesson, while the learning objective is what you want the children to learn. For example, the learning objective might be: To be able to write descriptively, while the learning outcome could be a story or diary entry etc.
One problem with using the mean, is that it often does not depict the typical outcome. If there is one outcome that is very far from the rest of the data, then the mean will be strongly affected by this outcome. Such an outcome is called and outlier. An alternative measure is the median. The median is the middle score. If we have an even number of events we take the average of the two middles.