2、繪製一個圖呈現兩個不偏估計式的抽樣分配，其中一個是相對有效的。此外，兩估計式均為常態分配，欲估計的參數為 θ。(10 分)

2. Is there evidence of a linear relationship between the numberof hours of television viewing and how overweight the child is?Please calculate the t-statistics, and use a two-tail test of at a5% significance level to support your judgment. Formulas tocalculate the t-statistics are provided as follows. (15 分)