Question

a division wide aptitude test in mathematics was conducted to 1,000 pupils the mean of the test is 58 and the standard deviation is 12. find the z-value that corresponds to a score x = 70. draw the normal curve distribution. what is your conclusion regarding the scores of the pupils

Answer 1

$Z=\frac{x-\mu}{\sigma}=\frac{70-58}{12}=1$

Conclusion is that 84.13% of pupils have scores less than 70.