A 2015 survey by the American Marketing Association showed that 47% of Snapchat users are between 18 and 24 years old. Suppose a follow-up survey were recently conducted to investigate if the proportion had changed and that out of a random sample of 225 Snapchat users, it found that 126 users were between 18 and 24 years old. Using α = 0.10, answer the following:

a. State the null and alternative hypotheses.

b. What conclusions can be made about the proportion of Snapchatters between 18 and 24 years of age?

c. Determine the p-value for this test and interpret its meaning.