A ướ c l ượ ng kho ả ng tin c ậ y 80 cho m

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60$/tháng. a. Ướ c l ượ ng kho ng tin c y 80% cho m c l ươ ng tháng trung bình c a công nhân làm vi c t i KCX. b. Làm l i câu a v i kho ng tin c y là 95%. Anh/Ch có k ế t lu n gì v b r ng kho ng tin c y này so v i b r ng kho ng tin c y tìm đượ c câu a. Gi i thích ng n g n câu tr l i c a Anh/Ch . Bài 6 (d a theo đề tài nhóm K05401 c a Nguy n Duy Ki t 0052, Đặ ng Th H ng H nh 0029, V ũ Th Thu H ng 0030) M t nhóm sinh viên K05401 thu c Khoa Kinh t ế Đ HQG cho r ng k ế t qu h c t p đ i m trung bình c a sinh viên có th đượ c gi i thích b i thu nh p trung bình hàng n ă m c a Cha M . Để ki m tra tính đ úng đắ n c a gi thi ế t này, m t nhóm sinh viên đ ã ti ế n hành thu th p d li u t 1 m u nh g m 10 sinh viên c a Khoa Kinh t ế Đ HQG và đượ c k ế t qu nh ư sau: GV: Lê H ng Nh t 2/4 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 STT Đ i m trung bình ( Đ TB) Thu nh p trung bình hàng n ă m (TN – tri u đồ ng) 1 10 105 2 7.5 75 3 9 45 4 5 45 5 7.5 60 6 9 90 7 6 30 8 6 60 9 8 85 10 6.5 70 a. Hãy tính các giá tr th ng kê t ng h p cho bi ế n thu nh p trung bình hàng n ă m và bi ế n đ i m trung bình. Đ i n k ế t qu vào b ng sau: Tr th ng kê t ng h p Descripyive Statistics Bi ế n Đ TB Bi ế n TN S
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