〈5.4.b〉 āĻĒāĻ°āĻŋāĻ¸āĻ‚āĻ–ā§āĻ¯āĻžāĻ¨ āĻŦāĻŋāĻˇā§ŸāĻ• āĻĒā§āĻ°ā§āĻ¯āĻžāĻ•āĻŸāĻŋāĻ¸

[Math Center] 1. Each employee of a certain company is in either Department [latex]X[latex] or Department [latex]Y[latex], and there are more than twice as many employees in Department [latex]X[latex] as in Department [latex]Y[latex]. The average (arithmetic mean) salary is $[latex]25,000[latex] for the employees in Department [latex]X[latex] and $[latex]35,000[latex] for the employees in Department [latex]Y[latex]. Which […]

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〈5.3.a〉 āĻĄāĻžāĻŦāĻ˛-āĻ¸ā§‡āĻŸāĻŽā§āĻ¯āĻžāĻŸā§āĻ°āĻŋāĻ•ā§āĻ¸ āĻāĻŦāĻ‚ āĻ­ā§‡āĻ¨ āĻĄāĻžā§ŸāĻžāĻ—ā§āĻ°āĻžāĻŽ āĻ¸āĻŽā§āĻĒāĻ°ā§āĻ•āĻŋāĻ¤ āĻĒā§āĻ°āĻļā§āĻ¨

[Math Center] 1. Among the [latex]9,000[latex] people attending a football game at College [latex]C[latex], there were [latex]x[latex] students from College [latex]C[latex] and [latex]y[latex] students who were not from College [latex]C[latex]. Quantity A Quantity B The number of people attending the game who were not students [latex]9000-x-y[latex]     2. In a survey of [latex]250[latex] European […]

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〈5.2.b〉Percentile Related Practice

[Math Center] 1. The random variable [latex]X[latex] is normally distributed. The values [latex]650[latex] and [latex]850[latex] are at the [latex]60[latex]th and [latex]90[latex]th percentiles of the distribution of [latex]X[latex], respectively. Quantity A Quantity B The value at the [latex]75[latex]th percentile of the distribution of [latex]X[latex] [latex]750[latex]   2. Eight hundred insects were weighed, and the resulting measurements, […]

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〈5.3.a〉āĻĄāĻžāĻŦāĻ˛-āĻ¸ā§‡āĻŸāĻŽā§āĻ¯āĻžāĻŸā§āĻ°āĻŋāĻ•ā§āĻ¸ āĻāĻŦāĻ‚ āĻ­ā§‡āĻ¨ āĻĄāĻžā§ŸāĻžāĻ—ā§āĻ°āĻžāĻŽ

 [Math Center Home] [āĻ¨ā§‹āĻŸāĻƒ āĻāĻ‡ āĻ†āĻ°ā§āĻŸāĻŋāĻ•ā§‡āĻ˛āĻŸāĻŋ (5) Statistics and D.I. āĻŦāĻŋāĻ­āĻžāĻ—ā§‡āĻ°Â āĻ…āĻ§ā§€āĻ¨ā§‡Â ã€ˆ3〉Overlapping and Venn Diagrams āĻšā§āĻ¯āĻžāĻĒā§āĻŸāĻžāĻ°ā§‡āĻ° āĻ…āĻ¨ā§āĻ¤āĻ°ā§āĻ—āĻ¤, āĻ¯āĻžÂ ã€ˆ5.3.a〉āĻšāĻŋāĻšā§āĻ¨ āĻĻāĻŋā§Ÿā§‡ āĻĒā§āĻ°āĻ•āĻžāĻļ āĻ•āĻ°āĻž āĻšā§Ÿā§‡āĻ›ā§‡] 〈5.3.a〉āĻĄāĻžāĻŦāĻ˛-āĻ¸ā§‡āĻŸāĻŽā§āĻ¯āĻžāĻŸā§āĻ°āĻŋāĻ•ā§āĻ¸ āĻāĻŦāĻ‚ āĻ­ā§‡āĻ¨ āĻĄāĻžā§ŸāĻžāĻ—ā§āĻ°āĻžāĻŽ Overlapping Sets āĻ¸āĻžāĻ§āĻžāĻ°āĻŖāĻ¤āĻƒ āĻ­ā§‡āĻ¨āĻšāĻŋāĻ¤ā§āĻ° āĻŦāĻž āĻ­ā§‡āĻ¨āĻĄāĻžā§ŸāĻžāĻ—ā§āĻ°āĻžāĻŽ āĻŦā§āĻ¯āĻŦāĻšāĻžāĻ° āĻ•āĻ°ā§‡ āĻ āĻ§āĻ°āĻŖā§‡āĻ° āĻ…āĻ™ā§āĻ• āĻ¸āĻŽāĻžāĻ§āĻžāĻ¨ āĻ•āĻ°āĻž āĻšā§ŸāĨ¤ āĻ āĻ›āĻžā§œāĻž āĻ­ā§‡āĻ¨āĻĄāĻžā§ŸāĻžāĻ—ā§āĻ°āĻžāĻŽā§‡āĻ° āĻĒāĻ°āĻŋāĻŦāĻ°ā§āĻ¤ā§‡ āĻĄāĻžāĻŦāĻ˛-āĻ¸ā§‡āĻŸāĻŽā§āĻ¯āĻžāĻŸā§āĻ°āĻŋāĻ•ā§āĻ¸ āĻ¨āĻŋā§Ÿā§‡ āĻ•āĻŋāĻ­āĻžāĻŦā§‡ āĻ“āĻ­āĻžāĻ°āĻ˛ā§āĻ¯āĻžāĻĒāĻŋāĻ‚ āĻ¸ā§‡āĻŸ āĻāĻ° āĻ¸āĻŽāĻžāĻ§āĻžāĻ¨ āĻ•āĻ°āĻ¤ā§‡ āĻšā§Ÿ āĻ†āĻŽāĻ°āĻž āĻāĻ–āĻžāĻ¨ā§‡ āĻ¸ā§‡ āĻŦāĻŋāĻˇā§ŸāĻŸāĻž […]

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〈5.4.a〉āĻĒāĻ°āĻŋāĻ¸āĻ‚āĻ–ā§āĻ¯āĻžāĻ¨āĻƒ āĻ—ā§œ āĻ¨āĻŋāĻ°ā§āĻŖā§Ÿ

 [Math Center Home] [āĻ¨ā§‹āĻŸāĻƒ āĻāĻ‡ āĻ†āĻ°ā§āĻŸāĻŋāĻ•ā§‡āĻ˛āĻŸāĻŋ (5) Statistics and D.I. āĻŦāĻŋāĻ­āĻžāĻ—ā§‡āĻ°Â āĻ…āĻ§ā§€āĻ¨ā§‡Â ã€ˆ4〉Average āĻšā§āĻ¯āĻžāĻĒā§āĻŸāĻžāĻ°ā§‡āĻ° āĻ…āĻ¨ā§āĻ¤āĻ°ā§āĻ—āĻ¤, āĻ¯āĻžÂ ã€ˆ5.4.a〉āĻšāĻŋāĻšā§āĻ¨ āĻĻāĻŋā§Ÿā§‡ āĻĒā§āĻ°āĻ•āĻžāĻļ āĻ•āĻ°āĻž āĻšā§Ÿā§‡āĻ›ā§‡] 〈5.4.a〉āĻĒāĻ°āĻŋāĻ¸āĻ‚āĻ–ā§āĻ¯āĻžāĻ¨āĻƒ āĻ—ā§œ āĻ¨āĻŋāĻ°ā§āĻŖā§Ÿ The average (or the arithmetic mean) of a set is given by the following formula: Average  = sum/# of terms, which is abbreviated as [latex]A=S/n[latex] The sum, [latex]S[latex], refers to the sum of all the terms […]

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〈5.2.a〉Percentile Problems

 [Math Center Home] [āĻ¨ā§‹āĻŸāĻƒ āĻāĻ‡ āĻ†āĻ°ā§āĻŸāĻŋāĻ•ā§‡āĻ˛āĻŸāĻŋ (5) Statistics and D.I. āĻŦāĻŋāĻ­āĻžāĻ—ā§‡āĻ°Â āĻ…āĻ§ā§€āĻ¨ā§‡Â ã€ˆ2〉Percentile Problems āĻšā§āĻ¯āĻžāĻĒā§āĻŸāĻžāĻ°ā§‡āĻ° āĻ…āĻ¨ā§āĻ¤āĻ°ā§āĻ—āĻ¤, āĻ¯āĻžÂ ã€ˆ5.2.a〉āĻšāĻŋāĻšā§āĻ¨ āĻĻāĻŋā§Ÿā§‡ āĻĒā§āĻ°āĻ•āĻžāĻļ āĻ•āĻ°āĻž āĻšā§Ÿā§‡āĻ›ā§‡] Percentile A percentile is a measure used in statistics indicating the value below which a given percentage of observations in a group of observations fall. For example, the [latex]20[latex]th percentile is the value (or score) below which […]

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〈5.1.a〉āĻĒāĻ°āĻŋāĻ¸āĻ‚āĻ–ā§āĻ¯āĻžāĻ¨-āĻŽāĻ§ā§āĻ¯āĻŽāĻž āĻāĻŦāĻ‚ āĻŦāĻŋāĻšā§āĻšā§āĻ¤āĻŋ

 [Math Center Home] [āĻ¨ā§‹āĻŸāĻƒ āĻāĻ‡ āĻ†āĻ°ā§āĻŸāĻŋāĻ•ā§‡āĻ˛āĻŸāĻŋ (5) Statistics and D.I. āĻŦāĻŋāĻ­āĻžāĻ—ā§‡āĻ°Â āĻ…āĻ§ā§€āĻ¨ā§‡Â ã€ˆ1〉General Statistics āĻšā§āĻ¯āĻžāĻĒā§āĻŸāĻžāĻ°ā§‡āĻ° āĻ…āĻ¨ā§āĻ¤āĻ°ā§āĻ—āĻ¤, āĻ¯āĻžÂ ã€ˆ5.1.a〉āĻšāĻŋāĻšā§āĻ¨ āĻĻāĻŋā§Ÿā§‡ āĻĒā§āĻ°āĻ•āĻžāĻļ āĻ•āĻ°āĻž āĻšā§Ÿā§‡āĻ›ā§‡] 〈5.1.a〉āĻĒāĻ°āĻŋāĻ¸āĻ‚āĻ–ā§āĻ¯āĻžāĻ¨-āĻŽāĻ§ā§āĻ¯āĻŽāĻž āĻāĻŦāĻ‚ āĻŦāĻŋāĻšā§āĻšā§āĻ¤āĻŋ Median āĻŦāĻž āĻŽāĻžāĻāĻ–āĻžāĻ¨ā§‡āĻ° āĻ¸āĻ‚āĻ–ā§āĻ¯āĻžāĻƒ The median is calculated in one of two ways, depending on the number of data points in the set. For sets containing an odd number of values, the median is the […]

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