편입영어 · 인원수와 비율의 근거 검산

Two libraries expanded their online catalogues. In the first, annual visits rose from 400 to 600; in the second, they rose from 1,000 to 1,300. A local report praised the second library for gaining more visits, while a council member praised the first for its faster proportional growth. These claims need not conflict. An absolute increase counts additional visits, whereas a percentage increase relates that addition to the starting total. Neither figure alone reveals how many distinct readers used the service or whether the catalogue caused the change. Those questions require records identifying repeat visits and information about other changes during the same year.

Two libraries expanded their online catalogues. In the first, annual visits rose from 400 to 600; in the second, they rose from 1,000 to 1,300. A local report praised the second library for gaining more visits, while a council member praised the first for its faster proportional growth. These claims need not conflict. An absolute increase counts additional visits, whereas a percentage increase relates that addition to the starting total. Neither figure alone reveals how many distinct readers used the service or whether the catalogue caused the change. Those questions require records identifying repeat visits and information about other changes during the same year.

An employer compared accident reports before and after a safety programme. Reports fell from 24 in a year with 120,000 hours of work to 18 in a year with 60,000 hours. The manager celebrated the smaller total. A representative instead calculated accidents per 10,000 hours: the rate had risen from two to three. Fewer reports and a higher exposure-adjusted rate can coexist when exposure changes. The data do not identify whether training, equipment, reporting practices, or the mix of tasks explains the change. They do show why evaluating safety by the annual count alone may conceal a deterioration in the risk associated with a unit of work.

An employer compared accident reports before and after a safety programme. Reports fell from 24 in a year with 120,000 hours of work to 18 in a year with 60,000 hours. The manager celebrated the smaller total. A representative instead calculated accidents per 10,000 hours: the rate had risen from two to three. Fewer reports and a higher exposure-adjusted rate can coexist when exposure changes. The data do not identify whether training, equipment, reporting practices, or the mix of tasks explains the change. They do show why evaluating safety by the annual count alone may conceal a deterioration in the risk associated with a unit of work.