Researchers studying the effects of diet on growth would like to know if a vegetarian diet affects the height of a child. The researchers randomly selected 12 vegetarian children that were six years old. The average height of the children is 42.5 inches. The average height for all six-years-old children is 47.5 inches with a standard deviation of 3.8 inches. Assume the heights of children are approximately normally distributed. At the 10% significance level, conduct a hypothesis test to determine whether the vegetarian children are not the same height as other children. What is the testing parameter?A. population mean, population standard deviation is knownB. population mean, population standard deviation is unknownC. population proportionD. population variance