What makes you credible to speech on the subject?
Is wikipedia the most authoritative source that you have? Your evidence needs to be strengthened. The very act of stating that you are using anecdotal evidence means that you are telling your audience that you can't really believe or trust what you are going to tell them.

Your reference is not in the standard APA or MLA format.

How is this topic important for your audience? You need to show them that this information can benefit them.

Think of ways that you can personalize this speech. Turn the examples into ones that are related to your audience and their experiences.