Một hộp gồm có 5 sản phẩm loại I và 6 sản phẩm loại II. Lấy ngẫu nhiên (cùng 1 lúc) ra 3 sản phẩm. Gọi X là số sản phẩm loại I lấy ra trong 3 sản phẩm đó a. Tìm quy luật phân phối xác suất của X
b. Lập hàm phân phối xác suất của X
c. Tìm kì vong toán, phương sai của X

Find the rate at which the water is now flowing from the tap give your answer cubic centimetres per second

Use the given degree of confidence and sample data to construct a confidence interval for the population mean mu . assume that the population has a normal distribution. a laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 185 milligrams with sequals 17.6 milligrams. a confidence interval of 173.8 mgless than muless than 196.2 mg is constructed for the true mean cholesterol content of all such eggs. it was assumed that the population has a normal distribution. what confidence level does this interval represent?

Rachel is studying the population of a particular bird species in a national park. she observes every 10th bird of that species that she can find in the park. her conclusion is that the birds living in the park who belong to that species generally feed on insects. rachel's sample is . based on the sample she picked, rachel's generalization is