統計學 Flashcards

1
Q

醫學統計學工作的步驟為

A

統計研究設計、收集資料、整理資料、分析表達

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2
Q

統計分析的主要內容是

A

統計描述和統計推斷

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3
Q

有序分類

A

等級資料
eg 血型
低血型、正常、高血壓

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4
Q

抽樣誤差是指

A

樣本指標與總體之間的由於抽樣產生的差別

  • 個體差異;樣本量大小
  • 有一定規律,不可避免
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5
Q

一端無確切值的開口資料,描述其集中趨勢適用的統計指標是

A

中位數

不拘分布/分布類型不明的資料

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6
Q

均數等於中位數的分布類型是

A

正態分布

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7
Q

兩組均數相差懸殊的計量資料比較離散趨勢,最好選用的指標為

A

變異系數

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8
Q

正態分布的特點有

A

均數=中位數

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9
Q

某指標95%醫學參考值範圍的含義是

A

在”正常”總體中有95%的人在此範圍

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10
Q

標準誤大表示

A

用該樣本均數估計總體均數可靠性小

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