Directions: In a national survey by Food and Nutrition Research Institute of the Department of Science and Technology on April 2014 to adult Filipinos (20 years old and older), the average height of males is 163 cm with a standard deviation of 6 cm, and the average height of females is 151.4 cm with a standard deviation of 5 cm. You are a local statistician and you are interested to know if the average height of the adult males (or females) in your locality is different to the national average height. Use the knowledge on Hypothesis Testing on Population Mean, and do the following: A. Conduct a mini survey in your locality to at least 30 adult males (or females) . For male students, ask for the heights of 30 adult males. For female students, ask for the heights of 30 adult females. B. Determine the sample mean height. C. At 95% confidence, test the null hypothesis that there is no significant difference between the national average height and the local average height. D. State your conclusion.​