Online shopping. Several studies have found that the frequency with which shoppers browse Internet retailers is related to the frequency with which they actually purchase products and/or services online. Here are data showing the age of respondents and their answer to the question “how many minutes do you browse online retailers per week?”

a) Make a scatterplot for these data.

b) Do you think a linear model is appropriate? Explain.

c) Find the equation of the regression line.

d) Check the residuals to see if the conditions for inference are met.

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Age Browsing Time (min/wk) 22 492 50 186 44 180 32 384 55 120 60 120 38 276 22 480 21 510 45 252 52 126 33 360 19 570 17 588 21 498