Regression Analysis

NZ Level 7 (NZC) Level 2 (NCEA)

Interpreting Information from Fitted Lines I

A dam used to supply water to the neighboring town had the following data recorded for its volume over a number of months.

Month | $1$1 | $2$2 | $3$3 | $4$4 |
---|---|---|---|---|

Volume (billions of litres) | $120$120 | $108$108 | $106$106 | $86$86 |

a

Given the data in the table, plot the points on the number plane.

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b

Which of the following lines best fits the data?

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A

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B

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C

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D

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A

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B

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C

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D

Easy

Approx a minute

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S7-2 Make inferences from surveys and experiments: A making informal predictions, interpolations, and extrapolations B using sample statistics to make point estimates of population parameters C recognising the effect of sample size on the variability of an estimate

Use statistical methods to make an inference