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.
What you should know about taking TB medicines. 1  Take your TB medicines exactly as your doctor or nurse says, for as long as they say. 2  Ask your doctor or pharmacist to explain the side effects of TB medicine. 3  Do not take the pain medicine acetaminophen (TylenolÂ® or another brand). 4  Do not drink alcohol.