Kết quả trồng thử nghiệm loại cam giống mới trên diện tích 100ha cho năng suất như sau: Năng suất thu hoạch cam (tạ/ha) <27 27 - 29 29-31 >31 Diện tích trồng cam (ha) 5 28 47 20 Yêu cầu: a) Tính năng suất cam bình quân trên 1ha diện tích. b) Tính số Mode và số trung vị về năng suất cam trên 1ha diện tích. c) Tính các chỉ tiêu đánh giá độ biến thiên về tiêu thức năng suất thu hoạch cam trên 1ha: Khoảng biến thiên, độ lệch tuyệt đối bình quân, phương sai, độ lệch chuẩn và hệ số biến thiên.

Me! last question, and i'm stuck! write the algebraic expression that models the word phrase. the product of 2 divided by the number h and 8 more than the number k

Which expressions are equivalent to -7+3(-4e-3)? choose all answers that apply: choose all answers that apply: a -4(3e+4)? 4(3e+4) b 12e12e c none of the above

Ascientist studied a population of workers to determine whether verbal praise and/or tangible rewards affect employee productivity. in the study, some workers were offered verbal praise, some were offered tangible rewards (gift cards, presents, and some were offered neither. the productivity of each participant was measured throughout the study by recording the number of daily tasks completed by each employee. which inference might the scientists make based on the given information? a.) the number of daily tasks completed by each employee may influence the dependent variable, which is whether the employee receives verbal praise, tangible rewards, or neither. b.) verbal praise and/or tangible rewards may influence the independent variable, which is the number of daily tasks completed by each employee. c.) verbal praise and/or tangible rewards may influence the dependent variable, which is the number of daily tasks completed by each employee. d.) the dependent variables, which are verbal praise and tangible rewards, may influence the number of daily tasks completed by each employee.