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In Country A, the population mean height for 3-year-old boys is 37 inches. Suppose a random sample of 15 3-year-old boys from Country B showed a sample mean of 36.3 inches with a standard deviation of 2 inches. The boys were independently sampled. Assume that heights are Normally distributed in the population. Complete parts a through c below. a. Determine whether the population mean for Country B boys is significantly different from the Country A mean. Use a significance level of 0.05. Which of the following correctly states Ho and Ha? Ho: H # 37 Ho: H 2 37 Ho: H > 37 O A. Ha: H = 37 O B. Ha: H 37 F. Ha: H# 37 Find the test statistic. t= (Type an integer or decimal rounded to two decimal places as needed.)