Jimmy
2022-03-28 10:30An analyst believes that hedge funds have significantly (using a significance level of 0.05) outperformed the S&P 500 over the past five years. So she picks a random group of 15 hedge funds and finds that their mean return over this period is 85% and their standard deviation is 45%. During the same period the S&P 500 has risen by 75%. The critical value of the t-statistic for this study is:
所屬:FRM Part I > Quantitative Analysis 視頻位置 相關(guān)試題
來源: 視頻位置 相關(guān)試題
1個回答
Jenny助教
2022-03-28 13:46
該回答已被題主采納
同學你好,題目的意思是,分析師認為對沖基金hedge fund的收益是要高于(outperformed)sp 500的,他收集的數(shù)據(jù)表明對沖基金的收益是85%,sp500的收益是75%,所以他想要證明的是對沖基金是否顯著高于sp500收益,這個沒有等號應該放在備擇假設(shè)。也就是原假設(shè)應該是85%<=75%。無論如何,這題肯定是單尾的。最終題目問的是查表值,critical value,所以我們只要找95%置信水平下,單尾的t分布查表值,也就是1.76,這里用t分布是因為這個是個小樣本(只有15哥對沖基金的數(shù)據(jù))。
感謝正在備考中乘風破浪的您來提問~如果您對回復滿意可【點贊】鼓勵您和Jenny更加優(yōu)秀,您的聲音是我們前進的動力,祝您生活與學習愉快!~
