I believe they mean that the random variables have a common support. For example, if X ~ Unif[0,2] and Y ~ Unif[1,3], then their respective PDF's overlap in the interval [1,2], meaning the only interval where both X and Y can have common values is [1,2]. To illustrate, below is a representation of the supports of X and Y, below which is a representation of the real line.
1 Thyroid cancer is a malignant tumor of the thyroid gland. 2  Symptoms of thyroid cancer include swelling in the neck (goiter), neck pain, hoarseness, swallowing and breathing problem, swollen lymph gland in the neck.
Gravesâ disease. Another condition which causes the swelling of the thyroid gland is Gravesâ disease, which is an autoimmune disease. Here, the antibodies in the immune system would stimulate the thyroid gland to overproduce hormones in the thyroid gland.eople who have a swollen thyroid will manifest one or some of the following symptoms: 1  Migraine. 2  Excessive fatigue. 3  Abnormally heavy menstrual bleeding. 4  Swollen and stiff joints. 5  high cholesterol level. 6  Increased weight. 7  Cramps and weakness in the muscular region. 8  Constipation.