x 2 sum - The total of each value in the x column squared and then added together. y 2 sum - The total of each value in the y column squared and then added together. N - The total number of elements (or trials in your experiment).
Patients with tuberculosis of the lungs have a prolonged illness with fever, cough, night-sweats, weight loss and may occasionally cough up blood. As the disease progresses, symptoms get worse and shortness of breath ensues. Untreated disease can be fatal.
Some diseases get worse when you come into contact. with a harmful substance, and some diseases are caused. by exposure to chemicals. A few examples of diseases. caused by an exposure include smog and asthma caused. by exposure to smog, mesothelioma caused by exposure to.