Data on height and circumference of a sample of douglas

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Reference no: EM131818122

The Quantitative Environmental Learning Project presented data on height and circumference of a sample of Douglas fir trees.2 Notice that heights level off after circumferences exceed about 4 meters.

1626_circumference of a sample of Douglas fir trees.png

Which one of the following conditions for a regression model is not met:

a. Scatterplot should appear linear.

b. Sample size should be large enough to offset non-normality in responses.

c. Spread of responses should appear fairly constant over the range of explanatory values.

d. Explanatory/response values should constitute a random sample of independent pairs.

Reference no: EM131818122

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