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五月备考:今日份的SAT数学练习题(附答案和详解)

2018年03月29日09:00 来源:小站整理
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摘要:本文为大家带来一道SAT数学练习题,五月份眼看着就很近了,备考的时间越来约紧张,大家都开始调整状态进入冲刺阶段了。平常的练习也千万不能掉以轻心,我们一起来做一道SAT数学练习题吧。

下面我们就一起来看看这道SAT数学练习题,测试一下吧。这道题的题目和答案都有点长,大家耐心做完哦。

五月备考:今日份的SAT数学练习题(附答案和详解)图1

Mathematics>Standard Multiple Choice

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

A potato chip company produces the same numberof snack-sized bags of potato chips every month. Amanager at the company randomly selects a sample of snack-sized bags of potato chips to beweighed in a routine quality-assurance check each month. The January sample had a meanweight of 0.95 ounces and a margin of error of 0.06 ounces. The February sample had a meanweight of 0.98 ounces and a margin of error of 0.04 ounces. Based on these findings, which ofthe following is an appropriate conclusion?

A.Most of the snack-sized bags of potato chips produced by the company in January each had aweight of at least 0.95 ounces, while most of the snack-sized bags of potato chips produced bythe company in February each had a weight of at least 0.98 ounces.

B.The mean weight of all the snack-sized bags of potato chips produced by the company inJanuary must have been 0.03 ounces more than the mean weight of all the snack-sized bags ofpotato chips produced by the company in February.

C.The mean weight of all the snack-sized bags of potato chips produced by the company inJanuary was 0.03 ounces less than the mean weight of all the snack-sized bags of potato chipsproduced by the company in February.

D.The number of snack-sized bags of potato chips in the January sample was less than thenumber of snack-sized bags of potato chips in the February sample.

答案:D

解析:

Choice D is correct. Start by interpreting the resultsof each sample individually before comparing thetwo.

The January sample had a mean weight of 0.95 ounces and a margin of error of 0.06 ounces. The February sample had a mean weight of 0.98 ounces and a margin of error of 0.04 ounces.

This means that the average weight of a snack-sized bag of potato chips in the January samplewas less than the average weight of a snack-sized bag of potato chips in the February sampleand that the margin of error for the January sample was larger than the margin of error forthe February sample.

The weight of the samples does not mean that the entire populations had the same attributes, but the margin of error does give some insight about the sample sizes.

Since the population of all snack-sized bags of potato chips was the same in January as it wasin February, the larger margin of error in January indicates that the January sample size wassmaller than the February sample size.

以上就是小站为大家整理的SAT数学练习题,希望能够帮助到大家。小站会一直陪在大家身边,备考SAT的宝宝们加油哦~

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