For Each of the Following Scenarios, Determine Whether the Alternative

Multiple Choice

For each of the following scenarios, determine whether the alternative hypothesis would be one-sided or two-sided.
-In 2010, it was believed that 18% of American cell phone owners do their browsing on their phone rather than a computer or other device. A recent survey conducted on a representative sample of 621 American cell phone owners showed 22% now do their browsing on their mobile device. Do these data provide evidence that the proportion of American cell phone owners who do their browsing on their phones rather than their computers or other devices has changed in the last 10 years?

A) one-sided
B) two-sided