The minimum daily wage in the National Capital Region is ranging from Php 500 to Php 537. The city labor office made a surprise visit at a large factory and conducted a survey with 40 employees...

Extracted text: The minimum daily wage in the National Capital Region is ranging from Php 500 to Php 537. The city labor office made a surprise visit at a large factory and conducted a survey with 40 employees randomly selected and asked their daily wages. It was found that the sample average daily wage was at Php 480 with a standard deviation of Php 85. Construct an interval estimate of the actual average daily wage of all employees in the said factory at 95% confidence. Is the factory following the stipulated minimum daily wage in the region?