When the confidence interval of $A$ do not overlap with the mean $B$ then the condition is not verified and $I_{A-B}$ does not contain 0. (True mean difference can then not be 0). As an example, $A = 10, s_A = 5, B = 15, s_B = 7, n_A = n_B = 10$ $I_A = [7.763932, 12.23607]$ $I_B = [11.8695, 18.1305]$ $I_A$ and $I_B$ do overlap but no CI overlap the means $A$ or $B$. $I_{A-B} = [-8.847077, -1.152923]$ So the true value of $A-B$ is lesser than 0, $A$ and $B$ are different. If $B = 13$ then
The thyroid gland also produces another hormone called calcitonin, and the parathyroid glands secrete parathyroid hormone. Parathyroid hormone and calcitonin participate in control of calcium and phosphorus homeostasis and have significant effects on bone physiology.he thyroid gland also produces another hormone called calcitonin, and the parathyroid glands secrete parathyroid hormone. Parathyroid hormone and calcitonin participate in control of calcium and phosphorus homeostasis and have significant effects on bone physiology.
The thyroid gland is influenced by hormones produced by two other organs: 1  The pituitary gland, located at the base of the brain, produces thyroid stimulating hormone (TSH). 2  The hypothalamus, a small part of the brain above the pituitary, produces thyrotropin releasing hormone (TRH).ormally, TSH increases the uptake of iodine by the thyroid gland and increases production of thyroid hormone. If there is little iodine available in our diet, insufficient thyroid hormone is produced by the thyroid; hypothalamic TRH causes TSH to be released from the pituitary in large amounts.