When a weighted mean is used, the variance of the weighted sample is different from the variance of the unweighted sample. The biased weighted sample variance is defined similarly to the normal biased sample variance: where, which is 1 for normalized weights.or example, consider the weighted mean of the point [1 0] with high variance in the second component and [0 1] with high variance in the first component.
Grapefruit Diet: Foods Allowed. All meat (except for processed meat), eggs, cheese, nuts. Red onions, bell peppers, radishes, broccoli, asparagas, zucchini, mushrooms, cucumbers, green oinions, leaf spinach, cabbage, tomatoes, green beans, lettuce, coleslaw, green beans, dill pickles. Mayonnaise, low carb dressing.
Grapefruit Nutrition. Grapefruit is an excellent source of vitamin C, a vitamin that helps to support the immune system. Vitamin C also prevents the free radical damage that triggers inflammatory conditions such as asthma, osteoarthritis, and rheumatoid arthritis. For the salad: Peel and trim the ends from each grapefruit. 2  Place supreme-cut grapefruit segments in a large salad bowl. 3  Add the lettuce, fennel, scallions, cucumber (if using), and thyme. 4  Pour the dressing over the salad and toss until all the ingredients are coated. 5  Arrange the caramelized onions on top and serve.