3. The CEO of a large supermarket chain in NCR is claiming to be paying its contractual employees higher than the minimum daily wage rate of Php500. To check on this claim, a labour union leader obtained a random sample of 144 contractual employees from this supermarket chain. The survey of their daily wage earnings resulted to an average wage of Php510 per day with standard deviation of Php100. Perform a test of hypothesis at 5% level of significance to help the labour union leader make an empirical based conclusion on the CEO's claim. Ho (In words): Ho (In Symbols): Ha (In Words): Ha (In Symbols): Level of Significance Test Statistics Critical Region Computation Decision Conclusion

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