Holistic Health. Weight gain that occurs when your weight increases without increasing your food intake has many causes. Thyroid hormone deficiency may slow metabolism, resulting in weight gain from fat gain and water retention.
used when the range is large and classes several units in width are needed ungrouped frequency distribution used for numerical data and when range of data is small; each class is only one unit
Statisticians, therefore, use frequency distribution graphs to depict the data in a comprehensive manner, such as a histogram, which divides data into class intervals and counts the frequency at which all the members belonging to that class interval occur.