A Least Squares Regression Line

question 130

Multiple Choice

A least squares regression line

• A) can be used to predict a value of y if the corresponding x value is given.
• B) implies a cause-and-effect relationship between x and y.
• C) can only be determined if a good linear relationship exists between x and y.
• D) ensures that the predictions of y outside the range of the values of x are valid.

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Definitions:

Micronucleus

One or more smaller nuclei found, along with the macronucleus, in ciliates. The micronucleus is involved in sexual reproduction. Compare with macronucleus.

Macronucleus

A large nucleus found, along with one or several micronuclei, in ciliates. The macronucleus regulates metabolism and growth. Compare with micronucleus.

Ciliates

A group of protozoans characterized by the presence of hair-like structures called cilia, used for movement and feeding.

Diplomonads

Small, mostly parasitic excavates with one or two nuclei, no functional mitochondria, and one to four flagella.