B. Data analysis and statistical techniques

A cross-border logistics company wants to survey its drivers regarding a new routing software. The workforce is divided into three distinct groups: long-haul international drivers (20%), regional drivers (50%), and local city drivers (30%). The researchers randomly select drivers from each group in exact proportion to their representation in the total workforce. Which sampling method is being used?

A heavy manufacturing plant records total overhead costs of $50,000 when producing 10,000 units, and $70,000 when producing 15,000 units. Management notes that fixed costs step up by $5,000 when production exceeds 12,000 units. Using the high-low method, calculate the estimated total overhead cost for producing 14,000 units. (Enter the numeric value only, without commas or currency symbols)

A corporate law firm uses time series analysis to forecast the number of billable hours for the upcoming quarter. They use a centered moving average to isolate the trend. What is the primary purpose of calculating a moving average in time series analysis?

An e-commerce platform analyzes the relationship between the delivery time (in days) and the customer satisfaction score (out of 100). The calculated correlation coefficient (r) is -0.88. Which of the following is the most accurate interpretation of this result?

A renewable energy company is evaluating the potential financial return of a new solar farm project. The analysts have modeled three possible scenarios for the first year's net cash flow: - Optimistic scenario: $100,000 (Probability: 0.20) - Most likely scenario: $60,000 (Probability: 0.50) - Pessimistic scenario: -$20,000 (Probability: 0.30) Calculate the Expected Value (EV) of the first year's net cash flow. (Enter the numeric value only, without commas or currency symbols)

A biotech laboratory uses index numbers to track the cost of specialized chemical reagents over time. They decide to use a Laspeyres price index rather than a Paasche price index. Which of the following is a characteristic of the Laspeyres price index?