Kiểm tra ngẫu nhiên 100 sản phẩm do một nhà máy sản xuất, người ta thấy có 12 phế phẩm. a. Với độ tin cậy là 95%, bạn hãy ước lượng tỷ lệ phế phẩm của nhà máy đó. b. Nếu muốn độ chính xác là 0,03 thì cần phải lấy tối thiểu bao nhiêu sản phẩm để kiểm tra?

Read the excerpt from the strange case of dr jekyll and mr. hyde what do dr. jekyll's thoughts reveal about him in this excerpt? [t]he inmates of my house were locked in the most rigorous hours of slumber, and i determined, flushed as i was with hope and triumph, to venture in my new shape as far as to my bedroom. i crossed the yard, wherein the constellations looked down upon me, i could have thought, with wonder, the first creature of that sort that their unsleeping vigilance had yet disclosed to he is jealous of those who can sleep through the night. he is revered for his scientific advances. he is interested in studying the movements of the stars he is proud and enthusiastic about his initial results.