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Chapter 12: Q. 67 (page 721)

Recently, the annual number of driver deaths per \(100,000\) for the selected age groups was as follows:

a. For each age group, pick the midpoint of the interval for the \(x\) value. (For the \(75+\) group, use \(80\).)

b. Using 鈥渁ges鈥� as the independent variable and 鈥淣umber of driver deaths per \(100,000\)鈥� as the dependent variable,

make a scatter plot of the data.

c. Calculate the least squares (best鈥揻it) line. Put the equation in the form of: \(\hat{y}=a+bx\)

Short Answer

Expert verified

Part a.

Part b.

Part c. \(\hat{y}=35.58-0.191x\)

Step by step solution

01

Part a. Step 1. Given information

Given,

02

Part a. Step 2. Explanation

Here,

03

Part b. Step 1. Explanation

Graph:

04

Part c. Step 1. Explanation

\(\hat{y}=35.58-0.191x\)

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Most popular questions from this chapter

Does the line seem to fit the data? Why or why not?

59. The Gross Domestic Product Purchasing Power Parity is an indication of a country's currency value compared to another country. Table 12.16 shows the GDPPPP of Cuba as compared to US dollars. Construct a scatter plot of the data.

Year
Cuba's PPP
Year
Cuba's PPP
1999
1,700
2006
4,000
2000
1,700
2007
11,000
2002
2,300
2008
9,500
2003
2,900
2009
9,700
2004
3,000
2010
9,900
2005
3,500

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