Think About It

  1. 21.

    1. Response: total cost; explanatory: number of items. Scatterplot: linear, positive direction with lots of variation

    2. Response: items produced; explanatory: hours worked. Scatterplot: positive direction, linear (with perhaps some curvature for long hours), and moderate variation

    3. Response: time; explanatory: weight. Scatterplot: negative direction, probably linear with lots of variation in the times

    4. Response: gallons left; explanatory: number of miles. Scatterplot: negative direction, linear, with small variation around the trend

    5. Response: price change; explanatory: number recommending. Scatterplot: little or no pattern

  2. 23.

    1. Positive association, but weak

    2. Positive, 0.5

    3. It increases the correlation. The correlation would decrease. ...

Get Statistics for Business: Decision Making and Analysis, 3rd Edition now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.

Start your free trial