Ố l ? n quan sát times of observations trung

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l n quan sát Times of observations Trung bình Average Trung v Mean Y ế u v Mode GV: Lê H ng Nh t 3/4 Tr n Thi n Trúc Ph ượ ng
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Khoa Kinh t ế Đ HQG Kinh t ế l ượ ng HK4/2008 PS 1 Giá tr l n nh t Max Giá tr nh nh t Min Kho ng Range Ph ươ ng sai Variance Độ l ch chu n Standard deviation H s bi ế n thiên Coefficient of variation Đồ ng ph ươ ng sai Covariance b. V đồ th phân tán đ i m cho t p d li u trên. Dùng tr c hoành cho bi ế n thu nh p trung bình hàng n ă m và tr c tung cho bi ế n đ i m trung bình. Nh n xét 1 cách ng n g n v đồ th c a d li u. c. Theo Anh/Ch , gi thi ế t cho r ng đ i m trung bình c a m t sinh viên có th đượ c gi i thích b i thu nh p trung bình hàng n ă m c a Cha M đ úng hay không đ úng. Gi i thích ng n g n câu tr l i c a Anh/Ch . GV: Lê H ng Nh t 4/4 Tr n Thi n Trúc Ph ượ ng
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