Data is here: https://docs.google.com/spreadsheets/d/15Ihq0Ncp5ZixMI4PcZ1nqj1xN0qlUTELCVnGsIhpL-4/edit?usp=sharing

1. Based on your analysis so far, which of the following conclusion are supported (check all that apply)?

Select one or more:

a. Snapchat is more popular amongst younger users, while Facebook is more popular amongst older users.

b.There are differences in social media usage by age category.

c.There is no difference in social media usage by age category.

d. Snapchat is more popular amongst older users, but Facebook has equal appeal.

_2. There has been some controversy in the industry regarding YouTube. Some say YouTube's marketing practices unfairly target younger viewers. Use a two sample ttest (assuming unequal variances) to test this hypotheses. Compare the average age of YouTube users (YouTube=1) to non-YouTube users (YouTube=0). At a 5% significance, what is your conclusion:

Select one:

a.Opponents are wrong. The average age of YouTube users is not significantly less than non-YouTube users.

b.Opponents are right. The average age of YouTube users is significantly less than non-YouTube users.

3. Opponents of Facebook argue that they have too much of the market. They claim that more than 75% of U.S. residents use Facebook. Perform a one sample test of proportions to determine whether this statement is true. At a 5% significance, what is your conclusion?

Select one:

a. The opponents are incorrect, The percentage of people who use Facebook is not more than 75%.

b. The opponents are correct. More than 75% of people in the U.S. do use Facebook.

4. You do some additional analysis regarding Social Media and find that iPhone users are more likely to use Facebook than non-iPhone users (at 5% significance). That definitely means that iPhone usage causes people to use Facebook more often.

Select one:

True

False