Most US adults have social ties with a large number of people, including friends, family, co-workers, and other acquaintances. It is nearly impossible for most people to reliably list all the people they know, but using a mathematical model, social analysts estimate that, on average, a US adult has social ties with 634people.¹A survey of 1700randomly selected US adults who are cell phone users finds that the average number of social ties for the cell phone users in the sample was 664with a standard deviation of 778. Does the sample provide evidence that the average number of social ties for a cell phone user is significantly different from 634, the hypothesized number for all US adults?

State the null and alternative hypotheses.

Give the test statistic and the-value and state the conclusion of the test.

Does the sample provide evidence that the average number of social ties for a cell phone user is significantly different from, the hypothesized number for all US adults?