 Hi, this is Dr. Don with a problem out of Chapter 2 in McClave and my stat lab. This one gives us some raw data and asks us to find the range, variance, and standard deviation of this sample. And they're asking for descriptive statistics. We get those very quickly using stat crunch. Click on the rectangle there, open in stat crunch. So we have our data already there. We just need to go to stat, which is the place you normally go for most things in stat crunch. This is summary statistics, which is the same thing as descriptive statistics. And our data is in columns. So we select that data. Just click on it to move it over to the right side. And as we go down, we need to have the variance, so I'm going to click on that to select it. Scroll key, and then move down. I need the standard deviation and the range. Of course, you can get all these other statistics if you need them, the means, standard error, median, min, max, the intercourtile range. So just be aware of that, that that summary statistics option in stat crunch will give you all of those things. Here we get very quickly our variance 4.86, which is that answer, range of six, which is that answer, and the standard deviation of 2.2, that answer there. Very quickly done in stat crunch.