Science and Daily life informative topics

  DEFINITION : “ Phenylketonuria (PKU)   is an   inborn error of metabolism   involving impaired metabolism of   phenylalanine , one of the   amino acids . Phenylketonuria is caused by absent or virtually absent   phenylalanine hydroxylase (PAH)   enzyme activity . ”   EXPLAINATION : ·          Protein-rich foods or the sweetener   aspartame   can act as poisons for people with phenylketonuria. ·          The role of PAH is to break down excess phenylalanine from food. ·           Phenylalanine is a necessary part of the human diet and is naturally present in all kinds of dietary protein. ·          It is also used to make aspartame , known by the trade name Nutrasweet , which is used to sweeten low-calorie and sugar free soft drinks, yogurts, and desserts. ...

  INTRODUCTION : ·          “ A measure of central tendency is a single value that attempts to describe a set of data by identifying the central position within that set of data ” . ·          The term   central tendency   dates from the late 1920s . ·          A central tendency can be calculated for either a finite set of values or for a theoretical distribution, such as the   normal distribution .   MEASURES OF CENTRAL TENDENCY : There are three measures of central tendency which are as follows : ·        Arithmetic mean ·        Median ·        Mode ·        Geometric mean   v ARITHMETIC MEAN : ü   “ In   statistics , the   arithmetic mean is the sum of a collection of numbers div...