Studied by 10 people

3.0(1)

get a hint

hint

1

a casual relationship is where

there is a reason why something happens

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2

example of a casual relationship is

as the age of something increases its value decreases

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3

with lines of best fit, if you have to plot it through the mean point, it means

find the mean of x and the mean of y and plot that point

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4

interpolation is

within the data and therefore is reliable

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5

extrapolation is

outside the data set and is therefore less reliable than interpolation

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6

line of best fit is also known as

the regression line

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7

equation of a line is

y=mx+c

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8

gradient means that

every time that x increases by 1 the y increases/decreases by m

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9

the y intercept is

the initial thing as it is where x is zero

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10

spearman’s rank tests

how strong or weak the correlation between two things are

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11

the equation for spearmans rank is

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12

in spearman’s, a perfect positive or negative correlation is

1 or -1

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13

in spearmans, a strong positive or negative correlation is

0.8 or above, -0.8 or below

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14

in spearman’s a weak positive or negative correlation is

0.4 or above, -0.4 or below

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15

in spearman’s you have to rank both x and y

the same way

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16

spearman’s rank is represented as

rs

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17

spearman’s rank is designed for

non-linear correlation

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18

what is more suitable for linear correlation

pearsons product moment correlation

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