9. (Z-Test). According to salary survey the average salary offered to computer science majors who graduated in May 2018 was $50, 352. Suppose this result is true for all computer science majors who
graduated in May 2018. A random sample of 200 computer science majors who graduated this year
showed that they were offered a mean salary of $51,750. The population standard deviation is $5240,
Using the 1% significance level can you conclude that the mean salary of this year's computer science
graduates is higher than $50,352? Use Traditional Method. Draw a graph.