The Audit Team of ABC University claims that the mean monthly salary of the teachers is Php18,000.00 with a standard deviation of Php4,500.00. A researcher takes a random sample of 20 teachers and found out that they have a mean monthly salary of Php16,550.00. Do the 20 teachers have lower salaries than the rest? Test the claim at a 0.05 level of significance.
a. Is the given problem directional? (5pts)
b. What is the computed value for t? (10pts)
c. What is the critical value? (5pts)
d. Will you accept or reject the Null Hypothesis? Why? (10pts)
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Answer:
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