과천외고 3학년 수능 영어 독해: 조사한 표본과 주장한 전체를 구별하는 법 실전문제

A museum asked visitors who entered the new gallery to rate it. Most respondents liked the lighting. People who waited outside and left before opening were not asked.

At a mountain station, wind was measured only on clear mornings because the road closed during storms. The measured winds were gentle. The report described clear mornings as calm, but a newspaper described the mountain as calm in all weather.

A survey link was printed on receipts at the sports center. Among respondents, most favored evening classes. Members who bought no item received no receipt, and visitors who never used the center were not in the survey.

Researchers counted nesting birds from a riverside tower during daylight. They reported more nests on the east bank than on the west bank. The west bank's reeds were taller, however, and the team made no night visits. A later drone survey of both banks found several nests hidden in the western reeds, though it did not measure how many birds used each bank at night.