Perhaps inadvertently he (Dr. Samuels) read out loud a statistic. The statistic stated that only 3 to 8, out of 100,000, people would experience transient global amnesia after having endured a traumatic event. He did not misspeak, because the same information was printed on the slide. I think he meant to impress us with the great likelihood that Ms. Arias has amnesia but if you think about it, looking at those numbers alone, it is immensely likely that Ms. Arias does not have amnesia. She is much more likely to be one of the 99,992 out of 100,000 people, who do not experience amnesia after a traumatic event.
The odds of her suffering amnesia after a traumatic event: 3-8 out of 100,000. The odds of her being struck by lightning in her life: 1 out of 5000. Perhaps Dr. Samuels should have said aloud, that which was stated in the text of the slide, Jodi Arias is many times more likely to be struck by lightning, than to have amnesia.