Statistics

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20 Terms

1

Q3

Median of the upper half. Also known as UQ.

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2

Q1

Median of the lower half. Also known as LQ.

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3

Q2

Median or middle value of the data set.

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4

Minimum

Lowest value or lower fence of data before it becomes an outlier. Minimum= Q1-1.5(IQR)

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5

Maximum

Highest value or upper fence of data before it becomes an outlier. Maximum= Q3+1.5(IQR)

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6

Equation for IQR

Q3-Q1

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7

What does a larger IQR or standard deviation say about the data?

It is more spread out.

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8

What data are bar graphs often used to display?

Categorical data

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9

What data are histograms often used to display?

Continuous numerical data

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10

X axis displays the…

Independent variable

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11

Y axis displays the…

Dependent variable

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12

The line of best fit is also described as…

Least squares regression line

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13

Interpolation

Involves making predictions inside the range of values shown.

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14

Extrapolation

Involves making predictions outside of the values shown.

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15

Sample of 100 students is a…

Random sample

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16

Sample of 100 students selecting every 12th student from an alphabetical list is a…

Systematic sample

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17

Choosing 25 students from each year level is a…

Stratified sample

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18

Collecting data from the first 25 students in each year level who express interest in completing a survey is a…

Quota sample

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19

Collecting data from the first 100 students to fill out the survey is a…

Convenience sample

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20

Surveying the entire school is a…

Population sample

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