An examination is marked out of 100. It is taken bby a large number of candidates. The mean for all candidates is 72.1 and the standard deviation is 15.2. Give a reason why a normal distribution with this mean and standard distribution, would not give a good approximation to the distribution of marks.
Standard normal random variable
`We` have given `mu=72.1 and sigma=15.2`
ie. 3.3% which is ,non negligible probabilty 3.3 % significant
Thus normal is non fit for this marks distribution.