Câu 4: (3 điểm) Có kết quả điều tra về giá bán và sản lượng tiêu thụ của một mặt hàng như sau: Tên cửa hàng

Số 2

Só 3

Tháng 4

Giá bán

|1000 đồng/sản phẩm)

230

220

270

Tháng 5

Giá bán (1000 đồng/sản phẩm)

237

215

262

Sản lượng (sản phẩm)

2000

1200

3000

Sản lượng (sản phẩm)

2200

1100

3800

a. Phân tích sự biến động của chỉ tiêu giá bán bình quân tháng 5 so với tháng 4 do các yếu tố ảnh hưởng?

b. Phân tích sự biến động của chỉ tiêu tổng doanh thu tháng 5 so với tháng 4 do các yếu tố ảnh hưởng?

How can a poor housing market put home buyers in a financially unstable position? a. changing property values means it’s easier to find homes with low rental costs. b. when the home value decreases, property taxes and insurance costs increase. c. houses are valued lower than their purchase prices, so the home equity decreases. d. home buyers lose all tax benefits and tax incentives when the housing market goes down. e. mortgage payments can increase even though the home value decreases.

Oceanside marine company manufactures special metallic materials and decorative fittings for luxury yachts that require highly skilled labor. oceanside uses standard costs to prepare its flexible budget. for the first quarter of the year, direct materials and direct labor standards for one of their popular products were as follows: direct materials: 2 pound per unit; $ 11 per pound direct labor: 2 hours per unit; $ 19 per hour oceanside produced 2 comma 000 units during the quarter. at the end of the quarter, an examination of the direct materials records showed that the company used 7 comma 500 pounds of direct materials and actual total materials costs were $ 98 comma 100. what is the direct materials cost variance? (round any intermediate calculations to the nearest cent, and your final answer to the nearest dollar.)

Reliability and validity reliability and validity are two important considerations that must be made with any type of data collection. reliability refers to the ability to consistently produce a given result. in the context of psychological research, this would mean that any instruments or tools used to collect data do so in consistent, reproducible ways. unfortunately, being consistent in measurement does not necessarily mean that you have measured something correctly. to illustrate this concept, consider a kitchen scale that would be used to measure the weight of cereal that you eat in the morning. if the scale is not properly calibrated, it may consistently under- or overestimate the amount of cereal that’s being measured. while the scale is highly reliable in producing consistent results (e.g., the same amount of cereal poured onto the scale produces the same reading each time), those results are incorrect. this is where validity comes into play. validity refers to the extent to which a given instrument or tool accurately measures what it’s supposed to measure. while any valid measure is by necessity reliable, the reverse is not necessarily true. researchers strive to use instruments that are both highly reliable and valid.