Variance. The Variance is defined as: The average of the squared differences from the Mean. To calculate the variance follow these steps: 1  Work out the Mean (the simple average of the numbers). 2  Then for each number: subtract the Mean and square the result (the squared difference).3  Then work out the average of those squared differences.o calculate the variance follow these steps: 1  Work out the Mean (the simple average of the numbers). 2  Then for each number: subtract the Mean and square the result (the squared difference).
Causes of Hormone Imbalance. Hormonal balance is vital to a healthy, cancer-free mind and body, but can be disrupted in many ways. Hormone fluctuations occur naturally, such as in puberty, menopause and perimenopause. Hormone imbalance may also be caused by toxins or an unbalanced lifestyle. Understanding the causes of hormone imbalance empowers us to prevent them, and at the same time, feel better, think better, and better prevent breast cancer.
Female hormones. Just as pregnancy hormone changes can cause hair loss, so can switching or going off birth-control pills. This can also cause telogen effluvium, and it may be more likely if you have a family history of hair loss. The change in the hormonal balance that occurs at menopause may also have the same result. âThe androgen (male hormone) receptors on the scalp becoming activated,â explains Mark Hammonds, MD, a dermatologist with Scott & White Clinic in Round Rock, Texas.