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0:11 As a kid I always loved information that I could get from data and the stories that could be told with numbers. I remember, growing up, I'd be frustrated at how my own parents would lie to me using numbers. "Talithia, if I've told you once I've told you a thousand times." No dad, you've only told me 17 times and twice it wasn't my fault. (Laughter)

0:39 I think that is one of the reasons I got a Ph.D. in statistics. I always wanted to know, what are people trying to hide with numbers? As a statistician, I want people to show me the data so I can decide for myself. Donald and I were pregnant with our third child and we were at about 41 and a half weeks, what some of you may refer to as being overdue. Statisticians, we call that being within the 95 percent confidence interval. (Laughter) And at this point in the process we had to come in every couple of days to do a stress test on the baby, and this is just routine, it tests whether or not the baby is feeling any type of undue stress. And you are rarely, if ever, seen by your actual doctor, just whoever happens to be working at the hospital that day. So we go in for a stress test and after 20 minutes the doctor comes out and he says, "Your baby is under stress, we need to induce you." Now, as a statistician, what's my response? Show me the data! So then he proceeds to tell us the baby's heart rate trace went from 18 minutes, the baby's heart rate was in the normal zone and for two minutes it was in what appeared to be my heart rate zone and I said, "Is it possible that maybe this was my heart rate? I was moving around a little bit, it's hard to lay still on your back, 41 weeks pregnant for 20 minutes. Maybe it was shifting around." He said, "Well, we don't want to take any chances." I said okay. I said, "What if I was at 36 weeks with this same data? Would your decision be to induce?" "Well, no, I would wait until you were at least 38 weeks, but you are almost 42, there is no reason to leave that baby inside, let's get you a room." I said, "Well, why don't we just do it again? We can collect more data. I can try to be really still for 20 minutes. We can average the two and see what that means. (Laughter) And he goes, "Ma'am, I just don't want you to have a miscarriage." That makes three of us. And then he says, "Your chances of having a miscarriage double when you go past your due date. Let's get you a room." Wow. So now as a statistician, what's my response? Show me the data! Dude, you're talking chances, I do chances all day long, tell me all about chances. Let's talk chances. (Laughter) Let's talk chances.

3:30 So I say, "Okay, great. Do I go from a 30-percent chance to a 60-percent chance? Where are we here with this miscarriage thing? And he goes, "Not quite, but it doubles, and we really just want what's best for the baby." Undaunted, I try a different angle. I said, "Okay, out of 1,000 full-term pregnant women, how many of them are going to miscarry just before their due date? And then he looks at me and looks at Donald, and he goes, about one in 1,000. I said, "Okay, so of those 1,000 women, how many are going to miscarry just after their due date?"

4:13 "About two." (Laughter) I said, "Okay, so you are telling me that my chances go from a 0.1-percent chance to a 0.2-percent chance."

10:48 Early on in our marriage, Donald had a stuffy nose and he had been taking a slew of medications to try to relieve his stuffy nose, to no avail. And so, that night he comes and he wakes me up and he says, "Honey, I can't breath out of my nose." And I roll over and I look, and I said, "Well, can you breath out of your mouth?" (Laughter) And he goes, "Yes, but I can't breath out of my nose!" And so like any good wife, I rush him to the emergency room at 2 o'clock in the morning. And the whole time I'm driving and I'm thinking, you can't die on me now. We just got married, people will think I killed you! (Laughter) And so, we get to the emergency room, and the nurse sees us, and he can't breath out of his nose, and so she brings us to the back and the doctor says, "What seems to be the problem?" and he goes, "I can't breath out of my nose." And he said, "You can't breath out of your nose? No, but he can breath out of his mouth. (Laughter) He takes a step back and he looks at both of us and he says "Sir, I think I know the problem. You're having a heart attack. I'm going to order an EKG and a CAT scan for you immediately." And we are thinking, no, no, no. It's not a heart attack. He can breathe, just out of his mouth. No, no, no, no, no. And so we go back and forth with this doctor because we think this is the incorrect diagnosis, and he's like, "No really, it'll be fine, just calm down." And I'm thinking, how do you calm down? But I don't think he's having a heart attack. And so fortunately for us, this doctor was at the end of the shift. So this new doctor comes in, he sees us clearly distraught, with a husband who can't breath out of his nose. (Laughter) And he starts asking us questions. He says, "Well, do you two exercise?" We ride our bikes, we go to the gym occasionally. (Laughter) We move around. And he says, "What were you doing just before you came here?" I'm thinking, I was sleeping, honestly. But okay, what was Donald doing just before? So Donald goes into this slew of medications he was taking. He lists, "I took this decongestant and then I took this nasal spray," and then all of a sudden a lightbulb goes off and he says, "Oh! You should never mix this decongestant with this nasal spray. Clogs you up every time. Here, take this one instead." He gives us a prescription. We're looking at each other, and I looked at the doctor, and I said, "Why is it that it seems like you were able to accurately diagnose his condition, but this previous doctor wanted to order an EKG and a CAT scan?" And he looks at us and says, "Well, when a 350-pound man walks in the emergency room and says he can't breath, you assume he's having a heart attack and you ask questions later." Now, emergency room doctors are trained to make decisions quickly, but not always accurately. And so had we had some information about our heart health to share with him, maybe we would have gotten a better diagnosis the first time.

14:13 I want you to consider the following chart, of systolic blood pressure measurements from October 2010 to July 2012. You'll see that these measurements start in the prehypertension/hypertension zone, but over about the course of a year and a half they move into the normal zone. This is about the heart rate of a healthy 16-year-old. What story is this data telling you? Obviously it's the data from someone who's made a drastic transformation, and fortunately for us, that person happens to be here today. So that 350-pound guy that walked into the emergency room with me is now an even sexier and healthier 225-pound guy, and that's his blood pressure trace. So over the course of that year and a half Donald's eating changed and our exercise regimen changed, and his heart rate responded, his blood pressure responded to that change that he made in his body.

15:18 So what's the take-home message that I want you to leave with today? By taking ownership of your data just like we've done, just by taking this daily measurements about yourself, you become the expert on your body. You become the authority. It's not hard to do. You don't have to have a Ph.D. in statistics to be an expert in yourself. You don't have to have a medical degree to be your body's expert. Medical doctors, they're experts on the population, but you are the expert on yourself. And so when two of you come together, when two experts come together, the two of you are able to make a better decision than just your doctor alone. Now that you understand the power of information that you can get through personal data collection, I'd like you all to stand and raise your right hand. (Laughter) Yes, get it up. I challenge you to take ownership of your data. And today, I hereby confer upon you a TEDx associate's degree in elementary statistics with a concentration in time-dependent data analysis with all the rights and privileges appertaining thereto. And so the next time you are in your doctor's office, as newly inducted statisticians, what should always be your response? Audience: Show me the data! Talithia Williams: I can't hear you! Audience: Show me the data! TW: One more time! Audience: Show me the data! TW: Show me the data. Thank you. (Applause)