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... Learn what makes tinnitus worse for you. Some people report that certain foods, drinks, or drugs can make their symptoms worse. Not everyone is affected the same way, so try to avoid triggers one at a time and keep a written log.