Statistics Second Quarter

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8 Terms

1
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mean of grouped data

= to sum of product of each class mark(x) and its corres freq, divided by # of quantities under consideration

2
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median class

  • found by dividing total freq by 2

  • find computed value in <cf column

  • in none then find closest value greater than computed value

3
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modal class

class w/ highest frequency

4
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fractiles

  • measures of position/location

  • includes not only central location but also any position based on no. of = divisions in a general distribution

5
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Commonly used fractiles

  • Quartiles

  • Deciles

  • Percentiles

6
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Quartiles

values that divide the distribution into 4 equal parts

7
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quartile class

determined by KN/4 → <cf where pasok ung #

8
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Fractile equivalents

  • Q2=D5=P50

  • Q4=D10=P100

  • Q1=P25

  • Q3=P75

  • D1=P10, etc.