五月备考：今日份的SAT数学练习题(附答案和详解)

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Read the following SAT test question and thenclick on a button to select your

answer.

In a recent study to determine how often people indifferent parts of the

United States check theweather, a random sample of residents in New England and

a random sample of residents onthe West Coast were surveyed. The study found

over 90% of people surveyed in New Englandchecked the weather daily, while 70%

of people surveyed on the West Coast did so. If themargin of error of both

samples were the same, which of the following statements is bestsupported by the

study's findings?

A.People in New England check the weather more often because the climate is

colder than onthe West Coast.

B.People in New England check the weather more often because there is more

weathercoverage on television than there is on the West Coast.

C.There is evidence that people in New England check the weather more often

than people onthe West Coast.

D.There is evidence that people in New England check the weather on their

smartphones morethan do people on the West Coast.

答案：C

解析：

Choice C is correct. A sample survey is a study thatobtains data from a

subset of a population, usuallythrough a questionnaire or interview, in order

toestimate population attributes.

Since the margin of error is the same for each sample, the only reasonable

conclusion basedon the data from the observational study is that there is

evidence (although not a guarantee) that people in New England check the weather

more often than people do on the West Coast.

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