样本平均数的标准误差

原版英语对话：Taking a Urine Sample(2)

A: Why are you handing me a plastic cup? B: Your doctor wants to test your urine and needs a sample. A: How am I supposed to do that? B: We need you to urinate like you normally would, and then stop and finish into the cup. A: What am I supposed to d

发表于:2018-12-02 / 阅读(380) / 评论(0)

英语情景对话-健康

数学英语 23 What are the Range and Standard Deviation?

by Jason Marshall Weve now talked about three methods for calculating average values: the mean, median, and mode (affectionately known as the three Ms). So, are we done? Is that everything we could ever want to know about interpreting average values?

发表于:2018-12-07 / 阅读(354) / 评论(0)

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AS IT IS 2016-02-29 Egypt Says It Sentenced Boy, 4, to Prison in Error

AS IT IS 2016-02-29 Egypt Says It Sentenced Boy, 4, to Prison in Error The Egyptian military admitted last week it made a mistake when sentencing a 4-year-old boy to prison for life. A mistaken identity and confusion inside the Egyptian court system

发表于:2018-12-08 / 阅读(379) / 评论(0)

2016年VOA慢速英语(二)月

数学英语 06 How to Calculate Mean Values

by Jason Marshall In the last article, we talked about averages and one specific way statistics can help answer questions without letting emotions interfere. But the type of average value we talked about is just one of manyuseful meanings assigned to

发表于:2019-01-02 / 阅读(423) / 评论(0)

数学英语

数学英语 07 How to Calculate Median Values

by Jason Marshall In the last article, we learned that there are several ways to calculate the average value of a sample of data. We focused on one such method, the arithmetic mean, and used it to calculate the average number of potato chips in a bag

发表于:2019-01-02 / 阅读(405) / 评论(0)

数学英语

学个词Learn a Word 第832期 Double standard

今天我们要学的词是double standard。Double standard, 双重标准。美国国会众议院议长佩洛西指责共和党人在医疗保健改革的辩论中使用双重标准, House Speaker Nancy Pelosi accused Republicans of having a double

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英语单词荟萃

单词超市第15期 double standard

今天要学的一个词组是：double standard。 Double standard是指双重标准。美国连锁商店沃尔马允许在中国的分店组织工会，却不允许在美国的商店组织工会。媒体报导的标题说：Critics claim double sta

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英语单词荟萃

Sample Outline and Essay

Below you will find a sample outline and the essay written from that outline. OUTLINE Paragraph 1 (Introduction) I. Leading sentence: It took me eighteen years to realize what an extraordinary influence my mother has been on my life. II. Summary of m

发表于:2019-01-20 / 阅读(402) / 评论(0)

实用英语

60秒科学:Bad Mileage Driving Tips

On May 19th, President Obama announced a new federal gas mileage standard. He wants the countrys entire car and light truck fleet to average 35.5 miles per gallon by 2016. Some reaction was swift and to the point. Heres forlorn Oklahoma Senator Tom

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60秒科学

体育词汇—保龄球运动英语:基础词汇

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外贸英语：品质 Quality(二)

We are responsible to replace the defective ones. 我们保换质量不合格的产品。 It's really something wrong with the quality of this consignment of bicycles. 这批自行车的质量确实有问

发表于:2019-02-01 / 阅读(356) / 评论(0)

实用英语

美国研究生入学考试会考到的统计题型

GRE 中容易考到的统计题型主要就有以下七种 1。mode（众数）一堆数中出现频率最高的一个或几个数e.g.modeof1,1,1,2,3,0,0,0,5is1and0 2。range（值域）一堆数中最

发表于:2019-02-07 / 阅读(327) / 评论(0)

英文语法词汇

China to promote audio-video coding standard

BEIJING, Aug. 24 (Xinhua) -- China will promote the application and industrialization of its self-developed audio-video coding standard (AVS+) in broadcasting and television, the State Administration of Radio, Film and Television (SARFT) said Friday.

发表于:2019-02-08 / 阅读(388) / 评论(0)

英语新闻

China releases standard names of Diaoyu Islands

BEIJING, March 3 (Xinhua) -- China has released standard names and descriptions of the Diaoyu Island and its affiliated isles, according to sources with the State Oceanic Administration. The Diaoyu Island is named as Diaoyu Island, with its Chinese p

发表于:2019-02-18 / 阅读(409) / 评论(0)

英语新闻

描述商品品质的英语口语

商品品质决定交易本质上的价值，因此它是最重要的交易因素之一。贸易上的品质决定方法有：凭样品买卖，凭标准买卖，凭规格买卖等。下面我们来看看品质的表达法。 [品质优良]：quality

发表于:2019-02-18 / 阅读(256) / 评论(0)

实用英语

4 Ways to Measure Your Standard of Living

4 Ways to Measure Your Standard of Living Standard of living should not equate to amount of spending. When I sat down to write an article on the countries with the highest standard of living, I thought it would be easy. But, how do you define standar

发表于:2019-02-18 / 阅读(467) / 评论(0)

阅读空间

每日一词【1003】gold standard

今天我们要学的词是gold standard。 Gold standard, 意思是同类事物的最高标准。 The iPhone is the gold standard in the smartphone market, iPhone是智能手机市场上最棒的产品。曾带领加州大学洛杉矶分校十次赢得

发表于:2019-02-18 / 阅读(479) / 评论(0)

英语每日一词

学个词Learn a Word 第1003期 Gold standard

发表于:2019-02-18 / 阅读(385) / 评论(0)

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英语听力精选进阶版 6322

What is a fair wage? Why aren't more people in the world offered pay equality? These are some of the questions the United Nations International Labour Organisation (ILO) has recently investigated. With a global population of over seven billion, is it

发表于:2019-02-21 / 阅读(285) / 评论(0)

英语听力精选进阶版

【健康】尿检-Taking a Urine Sample

A: What is that plastic cup for? B: Your doctor has requested a urine sample. A: Am I supposed to pee into the cup? B: We want what we call a clean sample. Urinate a drop or so into the toilet, and then stop the flow and urinate into the cup. A: Then

发表于:2019-02-27 / 阅读(353) / 评论(0)

健康-Health

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a bipolar type ion-exchange membrane electrolyzer