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。
在顯著性水平α=0.05時(shí)能否認(rèn)為方案A和方案B在藥品中轉(zhuǎn)時(shí)間上存在差異?您可能感興趣的試卷
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為什么在計(jì)算平均指標(biāo)的基礎(chǔ)上還有必要進(jìn)一步計(jì)算變異指標(biāo)?
A cumulative frequency polygon is also called ().
某廠某年職工勞動(dòng)生產(chǎn)率為20000元,是歷史最高水平的1.2倍。這里的1.2倍是()
A summary measure that is computed from a sample to describe a characteristic of the population is called()
Which of the following is not the goal of descriptive statistics?()
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()
Descriptive statistics deals with methods of()
A student achieves an 82 on the first test in a statistics course. From this, she assumes that her average at the end of the semester (after other tests) will be about 82. This is an example of ().
Which of the following statements is not true?()
One advantage of a stem and leaf plot over a frequency distribution is that ().