Public Health and Nutrition : Vitamin B3 (niacin ) helps to detoxify the body ,aids digestion, can ease the pain of migraine headaches and helps promote healthy skin. A random sample of adults in United states and in Europe was obtained and the daily in take of niacin ( in milligrams) was recorded. The data are summarized in the following table. a) Construct two histogram ,one for the United States and one for Europe. b) Describe the shape of each histogram .Does a comparison of the two histograms suggest any differences in niacin intake between the two samples? Explain
Inverse Normal Distribution
The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.
Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.
Z-Scores
A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.
Public Health and Nutrition : Vitamin B3 (niacin ) helps to detoxify the body ,aids digestion, can ease the pain of migraine headaches and helps promote healthy skin. A random sample of adults in United states and in Europe was obtained and the daily in take of niacin ( in milligrams) was recorded. The data are summarized in the following table.
a) Construct two histogram ,one for the United States and one for Europe. b) Describe the shape of each histogram .Does a comparison of the two histograms suggest any differences in niacin intake between the two samples? Explain
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