Activity 4: Test me! Directions: Complete the solution in each of the following problem. me 1. The average score in the entrance examination in Mathematics at Sto. Rosario National High School is 80 with a standard deviation of 10. A random of 40 students was taken from this year's examinees and it was found to have a mean score of 84. Accept a. Is there a significant difference between the known mean and the Reject sample mean? Test at a= 0.05 Rej Solution : Step 1. Ho : H = 80 : There is no significant difference between the hypothesized and the sample mean. tiled Ha : H * 80 : kiled Step 2. Level of significance, a = 0.05 , Step 3. two tailed test, find the critical value, Zt = Step 4. Compute the test-statistic value: cs at S Zc . student Step 5. Decision Rule : Step 6. Conclusion: mear hematics than