請問 organisms,的意思

Biology as a separate science was developed in the nineteenth century as scientists discovered that organisms shared fundamental characteristics. Biology is now a standard subject of instruction at schools and universities around the world, and over a million papers are published annually in a wide array of biology... show more Biology as a separate science was developed in the nineteenth century as scientists discovered that organisms shared fundamental characteristics. Biology is now a standard subject of instruction at schools and universities around the world, and over a million papers are published annually in a wide array of biology and medicine journals.

一、設X~N(3,0.16),求以下各題之機率值或Y值:

1. 由此常態母體中抽出 n=4 的隨機樣品:

(a) P( <2.5)=?

(b) P( >Y)=0.03 的Y=?

2. 由此常態母體中抽出 n=15 的隨機樣品:

(c) P(2.8 < <3.8)=?

(d) P(Y< <3)=0.17的Y=?



二、某大學學校學生心理測驗分數呈常態分布,平均為500,標準差為50,試問:

1. 某位學生的分數是高於510的機率為何? 低於400?

2. 若隨機抽出16位學生,求他們的平均分數( )介於480到520的機率為何?

3. 以500為中心, 有90%的機率此16名樣本的平均分數會介於多少之間?

4. 有80%的機率此16名樣本的平均分數會高於多少?

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Most biological sciences are specialized disciplines. Traditionally, they are grouped by the type of organism being studied: botany, the study of plants; zoology, the study of animals; and microbiology, the study of microorganisms. The fields within biology are further divided based on the scale at which organisms are studied and the methods used to study them: biochemistry examines the fundamental chemistry of life; molecular biology studies the complex interactions of systems of biological molecules; cellular biology examines the basic building block of all life, the cell; physiology examines the physical and chemical functions of the tissues and organ systems of an organism; and ecology examines how various organisms and their environment interrelate.
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