Problem
Claim: A minority of adults would erase all of their personal information online if they could. A software firm survey of 664 randomly selected adults showed that $45 \%$ of them would erase all of their personal information online if they could. Complete parts (a) and (b) below. b. Identify the null and alternative hypotheses.
Solution
Step 1 ：The null hypothesis is that the proportion of adults who would erase all of their personal information online if they could is equal to 0.5 (or 50%). The alternative hypothesis is that the proportion of adults who would erase all of their personal information online if they could is less than 0.5 (or 50%).
