Safari Live - Day 42 | National Geographic

We’re already familiar with the chi-squared statistic. If you’re not, I encourage you to review the videos on that. And we’ve already done some hypothesis testing with the chi-squared statistic. We’ve even done some hypothesis testing based on two-way tab…

Nadia wants to create a confidence interval to estimate the mean driving range for her company’s new electric vehicle. She wants the margin of error to be no more than 10 kilometers at a 90 percent level of confidence. A pilot study suggests that the driv…

Have you ever wondered if you watched the snow long enough what stories it might tell? There is someone who has done it; his name is Billy Barr. I spell it small b i l l y small b a r r. Some people call him the Snow Guardian. He lives in a cabin out in t…

What’s common between your morning hot coffee and a beautiful song coming from a guitar? To answer that question, we need to explore what kinetic energy is, and that’s what we’ll do in this video. But let’s zoom out a little bit. What exactly is energy t…

Hi everyone! Welcome to the homeroom live stream. Uh, we have a really exciting conversation today with Secretary Arne Duncan, uh, Secretary of Education under Barack Obama. Uh, but before we get into that, I will give my standard of announcements. Uh, f…

For many hundreds of years, mathematicians have been fascinated by the infinite sum which we would call a series of one plus one-half plus one-third plus one-fourth, and you just keep adding on and on and on forever. This is interesting on many layers. O…