In previous sittings of MTH201 the marks obtained by students in the final exam
has been successfully modelled with a normal distribution with a mean of 28 and a standard deviation of 8. A sample of 25 students from last semester’s exam
results shows average of 30. Does this mean that last semester’s students performed better
than the previous years.
a. Investigate at the 10 percent significance level
b. Explain what is meant by a TYPE II Error