Question: Use the following information to answer the next two exercises. The cost of a leading liquid laundry detergent in different sizes is given in Table

Use the following information to answer the next two exercises. The cost of a leading liquid laundry detergent in different sizes is given in Table 12.31.

Size (ounces)

Cost ($)

Cost per ounce

3.99

4.99

5.99

200

10.99

Table 12.31

a.Using size as the independent variable and cost as the dependent variable, draw a scatter plot.

Does it appear from inspection that there is a relationship between the variables? Why or why not?

b.Calculate the least-squares line. Put the equation in the form of: = a + bx

c.Find the correlation coefficient. Is it significant?

d.If the laundry detergent were sold in a 40-ounce size, find the estimated cost.

e.If the laundry detergent were sold in a 90-ounce size, find the estimated cost.

f.Does it appear that a line is the best way to fit the data? Why or why not?

g.Are there any outliers in the given data?

i. Is the least-squares line valid for predicting what a 300-ounce size of the laundry detergent would you cost? Why

or why not?

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