2. Vận dụng: Số liệu thu thập từ một mẫu điều tra về mức thu nhập như sau: Thu nhập (triệu đồng) 4 - 8 8 – 12 12 – 16 16 – 20 20 – 24
Số người 6 22 14 5 3
Hãy tính:
a. Thu nhập bình quân.
b. Số trung vị và mốt về thu nhập.
c. Độ lệch tuyệt đối bình quân về thu nhập.
d. Phương sai và độ lệch chuẩn về thu nhập.
e. Hệ số biến thiên về thu nhập.

Which of the following is false regarding the links between jit and quality? a. jit increases the cost of obtaining good quality. b. as quality improves, fewer inventory buffers are needed; in turn, jit performs better. c. jit reduces the number of potential sources of error by shrinking queues and lead times. d. inventory hides bad quality; jit immediately exposes it. e. if consistent quality exists, jit allows firms to reduce all costs associated with inventory.

According to the u.s. census bureau (), the median household income in the united states was $23,618 in 1985, $34,076 in 1995, $46,326 in 2005, and $57,230 in 2015. in purchasing power terms, how did family income compare in each of those four years? you will need to know that the cpi (multiplied by 100, 1982–1984 = 100) was 107.6 in 1985, 152.4 in 1995, 195.3 in 2005, and 237.0 in 2015

Actual usage for the year by the marketing department was 70,000 copies and by the operations department was 330,000 copies. if a dual-rate cost-allocation method is used, what amount of copying facility costs will be budgeted for the operations department?