肆、計算題： 1. 假設鍋爐給水加熱器之加熱面積寬裕度設定為 20%，其熱貫流率 K 為 2200 kcal/m2h0c，平均溫度差θ m為 20°C，熱處理量為 3840×103 kcal/h，則其設計之加熱面積應為多少平方公尺。

Part II The significance level for hypothesis testing is 0.05, unless otherwise specified.(50%)1. (10%) A study was instituted to learn how the diets of women changed during the winter and the summer. A random group of 12 women were observed during the month of July, and the percentage of each woman's calories that came from fat was determined. Similar observations were made on a different randomly selected group of size 12 during the month of January. Suppose the results were as follows:July: mean =30.83, standard deviation=4.30January: mean =35.13, standard deviation=4.51If we assume the population standard deviations for all months are equal, conduct a test for testing the hypothesis if the mean fat intake is the same for both months.

肆、計算題：
1. 假設鍋爐給水加熱器之加熱面積寬裕度設定為 20%，其熱貫流率 K 為 2200 kcal/m²h⁰c，平均溫度差θ _m為 20°C，熱處理量為 3840×10³ kcal/h，則其設計之加熱面積應為多少平方公尺。

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