Better Students Ask More Questions.
An examination is marked out of 100. It is taken bby a large number of candidates. The...
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.
1 Answer | add yours
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.
Posted by pramodpandey on May 6, 2013 at 5:54 AM (Answer #1)
Join to answer this question
Join a community of thousands of dedicated teachers and students.