Solution

Given:

4, 5, 4, 2, 1, 3, 3, 4, 2, 7

$$$$\textbf{Dotplot}

Create a number line For every given data value place a dot above the corresponding number on the number line.

(a) We note that the distribution is roughly symmetric (or mound shaped), because most of the dots lie roughly in the middle.

(b) There is 1 student in the sample that ate 5 cheeseburgers and there is 1 student that ate 7 cheeseburgers.

$$$$\frac{2}{10}=0.2

Thus 2 of the 10 college students in the sample are more than 4 cheeseburgers that week, which corresponds with a proportion of 0.2.

Answer

(a) Roughly symmetric

(b) 0.2

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