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Carrying Out a Test for the Slope of a Regression Model

AP Statistics· difficulty 2/5

A regression of weekly sales (y, in thousands) on advertising spend (x) gives the output below.

Regression Output Predictor Coef SE t Constant x 12.5 3.2 3.91 2.4 0.5 4.80 n = 20, R-sq = 0.56, s = 4.2

What is the estimated slope?

  • A

    4.80

  • B

    12.5

  • C

    2.4

    check_circle
  • D

    0.5

Explanation

The slope is the coefficient on x: 2.4. The constant 12.5 is the intercept.

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