Add math project

Obesity can lead to various health problems. My school has decided to carry out a â€Å"Healthy Lifestyle Campaign† with the aim to create awareness among students about obesity-related health problems. The Body Mass Index (BMI) gives an indication of the physical state of person as being underweight, normal, overweight or obese. BMI can be calculated by using the following formula: BMI = History Body Mass Index (BMI) The body mass index (BMI), or Quetelet index, is a measure for human body shape based on an individuals mass and height. It was devised between 1830 and 1850 by the Belgian polymath Adolphe Quetelet during the course of developing â€Å"social physics†. At first BMI was used by epidemiologists in studies of population health, but was quickly adopted by doctors who wanted a quick and easy way to measure body fat in their patients. By 1985, the National Institutes of Health began defining obesity according to body mass index. At first, the thresholds were established at 27. 8 for men and 27. 3 for women. Then in 1998, the NIH consolidated the threshold for men and women even though the relationship between BMI and body fat is different by sex and added the category of overweight. The new, drastically lowered thresholds were now 25 for overweight and 30 for obesity. Body mass index (BMI) is defined as the individuals body mass divided by the square of their height. The formulae universally used in medicine produce a unit of measure of . A frequent use of the BMI is to assess how much an individuals body weight departs from what is normal or desirable for a person of his or her height. The weight excess or deficiency may be accounted for body fat although other factors such as muscularity also affect BMI significantly. Who regards a BMI of less than 18. 5 as underweight may indicate malnutrition, eating disorder, or other health problems, while a BMI greater than 25 is considered overweight and above 30 is considered obese. These ranges of BMI values are valid only as statistical categories BMI Category below 18. 5 Underweight 18. 5 24. 9 Normal Weight 25 29. 9 Overweight 30 and above Obese BMI can also be determined using a BMI chart, which displays BMI as a function of mass (horizontal axis) and height (vertical axis) using contour lines for different values of BMI or colors for different BMI categories. A graph of body mass index as a function of body mass and body height is shown above. The dashed lines represent subdivisions within a major class. For instance the Underweight classification is further divided into severe, moderate, and mild subclasses. Obesity is a medical condition in which excess body fat has accumulated to the extent that it may have an adverse effect on health. It is defined by body mass index (BMI) and further evaluated in terms of fat distribution via the waist–hip ratio and total cardiovascular risk factors. BMI is closely related to both percentage body fat and total body fat. In children, a healthy weight varies with age and sex. Obesity in children and adolescents is defined not as an absolute number but in relation to a historical normal group, such that obesity is a BMI greater than the 95th percentile. The reference data on which these percentiles were based date from 1963 to 1994, and thus have not been affected by the recent increases in weight. Obesity is another term for excess body fat. Normal body fat percentages range from 18%-23% in men and 25%-30% in women. Men with body fat percentage greater than 25% and women with a body fat percentage greater than 3% are considered obese. Obesity occurs when intake of calories exceeds the daily caloric requirement. The National Institute of Health (NIH) classifies obesity as a chronic disease, which requires a lifelong effort. If an individual has excess body fat can be determine by various methods. These methods include body density using underwater body weight, dual x-ray absorptiometry (DEXA), measuring skin-fold thickness, computed tomography (CT), and magnetic resonance imaging (MRI). The DEXA test and weighing an individual underwater are most accurate methods, although they can be expensive, time consuming and are not always practical. The two most common methods for measuring a person’s excess body fat are using a weight-for-height tables and body mass index (BMI) measurement. The weight-for-height tables provide a range of acceptable weights for a person of a given height. There are many versions of these tables with different weight ranges, which limit their use. Because of variability of these tables, BMI has become the measurement of choice for many doctors and researchers. BMI is calculated using a mathematical formula that accounts for a person’s height and weight. BMI is equal to a person’s weight in kilograms (kg) divided by height in meters squared (BMI=). Aim The aim of this project work is to investigate the relationship between height, weight and BMI with students’ health condition. The purpose of this campaign is to create awareness among students about obesity or underweight related to health problems. We should select an appropriate balanced diet to avoid from being a victim to such illness. Nutritional guidelines play an important role in helping us to make informed choices about our nutrient intake. The foods that constitute a balanced diet should contain the major nutrients which include carbohydrates, proteins and lipids, as well as vitamins, minerals, water and dietary fibre. A balanced diet is essential for the healthy growth and development of the body. The objectives of carrying out this project work are: 1 To collect data on the heights and weights of students. 2 To calculate BMI of each students. 3 To represent data using various methods. 4 To relate students’ knowledge with the data obtained. 5 To suggest ways to practice healthy lifestyle. The methods of research are as follows: 1 To obtain the height, weight and BMI of 50 students in Form 1 and 50 students in Form 5. 2 To tabulate the data consisting the height, weight and BMI of this 100 students. 3 To convert the data and represent it using three different statistical graph. 4 To find the mean, mode and median of BMI for the 50 students from each group of students. 5 To calculate the variance and the standard deviation of BMI for this students. Statistic : Finding mean, mode and median of ungrouped data and grouped data. Finding interquartile range, variance and standard deviation of ungrouped data and grouped data. Finding gradient according to the data. Mean Mean for ungrouped data: Adding up all the values in a set of data and sum in then divided by the number of values, we shall obtain the mean of the set of data. Hence if