同等劑量的藥品采用不同的服用方式往往取得不同的效果，方案A是在每日三餐后服用，方案B是每日僅僅服用一次相同總劑量的藥品。對(duì)病情相似的20-44歲的患者進(jìn)行隨機(jī)抽樣，測(cè)試所服藥品在消化道中的中轉(zhuǎn)時(shí)間，選擇服用方案的順序是隨機(jī)的。下表給出了12名患者分別按方案A和方案B服用后，藥品在消化道中的中轉(zhuǎn)時(shí)間。
您可能感興趣的試卷
你可能感興趣的試題
最新試題
Descriptive statistics deals with methods of（）
常用的長(zhǎng)期趨勢(shì)測(cè)定的方法有哪些？各有什么特點(diǎn)？
Which of the following statements is not true？（）
某企業(yè)的生產(chǎn)計(jì)劃完成百分比采用如下分組，請(qǐng)指出哪項(xiàng)是正確的（）
Which of the following is best to show the percentage of a total budget that is spent on each category of items？（）
The number of class intervals in a frequency distribution is usually between （）.
某班的學(xué)習(xí)按考試成績(jī)分為60分以下，60-70，70-80，80-90，90-100，這種分組（）
One rule that must always be followed in constructing frequency distributions is that （）.
The number of phone calls arriving at a switchboard each hour has been recorded and the following frequency distribution has been developed.What is the cumulative frequency of the third class？（）
Which of the following is not the goal of descriptive statistics?（）