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A researcher reports that the average income of dentists in Metro Manila is Php42000 per month....

A researcher reports that the average income of dentists in Metro Manila is Php42000 per month. A sample of 25 dentists has a mean salary of Php43800. At a level of significance or 0.05, test claim that dentists earn more than Php42000 per month. The standard deviation is Php5400.

What should be your null hypothesis?

What should be your alternative hypothesis?

What is the level of significance?

What is the test statistic (is it t-test or z-test)?

What type of test significance should be used (One-Tailed or Two-tailed?)

What is the decision rule?

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