A veterinarian collects data about puppies in her practice. She makes a scatterplot with their age in weeks on the horizontal axis and weight in ounces (oz) on the vertical axis and sees that the scatterplot is football shaped. The average age of the puppies is 5 weeks, with an SD of 2 weeks. The average weight is 20 oz, with an SD of 4 oz. The correlation is moderately strong, with r = 0.6.

(a) For each variable, circle all the terms that are applicable.

Age (weeks): quantitative qualitative discrete continuous

Weight (oz): quantitative qualitative discrete continuous

(b) A puppy is three weeks old. Using the regression line, the puppy is

predicted to weigh ____________ oz, and this prediction is likely to be off by about

____________ oz.

(c) About what percent of all the puppies weigh less than 15 oz? ____________%

(d) About what percent of three week old puppies weigh less than 15 oz?

____________%