Solve the following problems. Show your COMPLETE solution. Write the GIVEN in each problem. (10pts each) 1. The cashier department of RDG University claims that the mean monthly salary of their employees is Php23,900 with a standard deviation of Php4,100. A researcher takes a random sample of 90 employees and found out that they have a mean salary of Php 19,650. Test the claim at 5% level of significance. 1. State the Null and Alternative Hypotheses IV. Compute for the computed value (2pts) (3pts) Given: II. Choose the appropriate statistical test (1pt) Ill. Determine the Level of Significance and the V. Make the Decision and Conclusion Critical Value (2pts) (2pts)