139***202020-10-10 22:54:55
您好,这是课后题reading 4的28题,想问a选项的r square根据这题目提供的信息没法算吧?谢谢
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Kevin2020-10-12 11:12:36
同学你好!
是的,无法计算。
致正在努力的你,望能解答你的疑惑~
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Johnny2020-10-12 11:16:37
同学你好,目前原版书已经进行勘误了,A选项现在已经修改成"99% confidence interval for the slope coefficient to be 0.1594 to 0.3114"
题目中Exhibit 2下面的Note修改成“The critical t-value for a two-sided t-test at the 5% significance level (df = 34) is 2.032. The critical t-value for a two-sided t-test at the 1% significance level (df = 34) is 2.728.”
第28题的答案解析中新增加了以下部分:A is incorrect because the lower limit for the confidence interval = 0.2354 – (2.728 × 0.0760) = 0.0281 and the upper limit for the confidence interval = 0.2354 + (2.728 × 0.0760) = 0.4427. B is incorrect because the lower limit for the confidence interval = 0.0095 – (2.032 × 0.0078) = –0.0064 and the upper limit for the confidence interval = 0.0095 + (2.032 × 0.0078) = 0.0254.”
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