Cell Phone Use for Internet Access, Worldwide. Would you expect that residents of richer countries tend to use their cell phones to browse the Internet more often than residents of poorer countries? The Pew Global Attitudes Project conducted a study5 of cell phone usage in countries around the world. The table shows x = the per capita gross domestic product (GDP, a measure of the wealth of the country), and y = the percentage of cell phone owners who use their cell phones to browse the Internet for a random sample of 10 countries. Use this information for Exercises 69–75.
| Nation | ||
|---|---|---|
| USA | 48,147 | 43 |
| Britain | 35,974 | 38 |
| France | 35,048 | 28 |
| Russia | 16,687 | 27 |
| Poland | 20,136 | 30 |
| Israel | 31,004 | 47 |
| China | 8,394 | 37 |
| Japan | 34,362 | 47 |
| India | 3,703 | 10 |
| Mexico | 15,121 | 18 |
cellregression
73. Interpret the values of the slope and the intercept. Determine whether the interpretation of the intercept represents extrapolation in this case.
4.2.73
For each increase of $1 in the country's per capita GDP the estimated percentage of cell phone users who use their cell phones to browse the Internet increases by 0.000604 percent.
The estimated percentage of cell phone users who use their cell phones to browse the Internet for a country with a per capita GDP of is 17.50%. This represents extrapolation.