Exam 38: Estimation and Percent Accuracy

Estimations in drafting are used to determine the cost of materials

A civil drafter estimates that a parcel of land contains 14,200 square feet. When surveyed, the parcel of land contains only 13,850 square feet. Find the percent to the nearest tenth percent of accuracy of the estimate.

A structural drafter estimates that 50 gusset plates will be needed to frame a building. It was found that only 40 were needed. The actual amount is within what percent to the nearest tenth percent of the estimate?

An architect estimates that is will take 50 hours to complete a proposed design for a customer. The architect completes the design in 45 hours. The actual amount is within what percent of accuracy of the estimate?

A CAD drafter estimates that 600 CAD symbols will be used on a set of drawings. When completed, 630 symbols were actually used. The actual amount is within what percent to the nearest percent of the estimate?

A drafting department supervisor estimates that 575 hours of drafting will be spent during a specific month. In fact, 610 hours are logged for that month. Find the percent to the nearest tenth percent accuracy of the estimate.

An architectural drafter estimates that 110 windows will be needed in a building. It is found that only 95 windows are needed. Find the percent of accuracy to the nearest tenth percent of the estimate.

The percentage of an expected value describes how close an approximation is to the expected value.

An office supervisor estimates the cost of supplies for the next month will be $190.00. When the bill for supplies arrives, the cost is only $181.00. Find the percent accuracy to the nearest tenth percent of the supervisor's estimate.

A CAD drafter estimates that it will take 75 hr. to complete a drafting project. It took 82 hr. to finish the project. What was the percent to the nearest percent of accuracy of the estimate?