IBMATHAI: U2 Modelling Statistics VOCAB

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17 Terms

1

Univariate Data

One Variable

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2

Qualitative Data

Categorical

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3

Quantitative Data

Numerical

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4

Discrete

Counted data; Specific values

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5

Continuous

Measurable data

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6

A population

Whole group

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7

Sample

A small group chosen from the population

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8

Simple Random Sampling

Selecting a sample completely at random

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9

Systematic Sampling

Selecting a sample at a regular interval

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10

Convenience Sampling

Getting data by selecting an easy to reach population

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11

A biased sample

sample that does not represent diversity of population

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12

Quota sampling

setting certain quotas for your sample

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13

Stratified Sampling

selecting random sample where numbers in certain categories are proportional to numbers in their population

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14

Percentile

Score below which a certain percentage of data lies

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15

Lower quartile; 25th percentile

(n+1)/4

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16

Median

(n+1)/2

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17

Upper quartile; 75th percentile

(3(n+1))/4

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