Question: We now use data from the Human Development data file

We now use data from the Human Development data file on cell phones use and Internet use for 39 countries.
a. The MINITAB output below shows a scatter plot. Describe it in terms of (i) identifying the response variable and the explanatory variable, (ii) indicating whether it shows a positive or a negative association, and (iii) describing the variability of Internet use values for nations that are close to 0 on cell phone use.
b. Identify the approximate x - and y -coordinates for a nation that has less Internet use than you would expect, given its level of cell phone use.
c. The prediction equation is ŷ = 1.27 + 0.475x. Describe the relationship by noting how yn changes as x increases from 0 to 90, which are roughly its minimum and maximum.
d. For the United States, x = 45.1 and y = 50.15. Find its predicted Internet use and residual. Interpret the large positive residual.

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  • CreatedSeptember 11, 2015
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