Lesson: WEEK 4: HYPOTHESIS TESTING - TEST ON POPULATION MEAN (Grade 11 - STEM)

GENERAL INSTRUCTION: Write your answer on a separate paper PROBLEM SOLVING: Test each of the following by performing the steps in hypothesis testing. ACTIVITY 1: Anna Garcia, the manager of EC Manufacturing Company believes that the average daily wages of the employees is below the currently known rate of at least P300. She wants to prove this by getting a sample of 22 employees that resulted toa mean daily wage of P285. The standard deviation of all the salary is P35. Assume the variable is normally distributed. At a = 0.01, is there enough evidence to support the manager's claim? ACTIVITY 2: Cris Elevators Inc. claims that the average cost of elevator installation and repair is still P228760. A sample of 60 repairs has an average of 227,880. The standard deviation of the sample is 3000. At a = 0.05, is there enough evidence to reject the company's claim? ACTIVITY 3: A CHED commissioner claims that the average cost of one year's tuition for all private colleges in Metro Manila is P32,800. A sample of 15 colleges is selected, and the average tuition is P31,080. The standard deviation of the sample is P4,000. At a = 0.01, is there enough evidence to reject the claim that the average cost of tuition is equal to P32.800? RUBRIC: Criteria! Points 4 Score Computation Includes correct computation. Shows multiple computational a roaches. Includes correct computation. Includes basic computation, some incorrect. Computation shows no evidence of understandin.. TOTAL Correctness All the answers provided are all correct and accurate. Most of the answers provided are all correct and accurate. Some of the answers provided are all correct and accurate. No answers are provided. Understanding Excellent understanding of the problem. Shows and explains more than the uroblem asks. Understands the problem. Minimal understanding of the problem. Attempts but demonstrates no understanding of the uroblem. I12