So here are the non-filtered, here are the filtered, and it looks like for the higher tar levels, the non-filtered cigarettes seem to be capturing that out. And we notice here on the horizontal axis of our graphs, we're looking at the amount of tar in the cigarettes. So now I've got a better picture of what's going on. I'm going to match this up to 12 - 15 here. So now I've got 12 - 15 here's my first column. And then I'm going to slide this up above the other one, but we're gonna move it over so that we match columns up. So let's move this down here a little bit and then we're going to do the same thing here. Now the second part of this problem asks, "Do cigarette filters appear to be effective?" Well, as I just mentioned a moment ago, I'm going to have to compare my graphs to get that.
So the rest of these are going to be zero. And now I'm going to fill in the numbers here from those actual columns and make sure everything matches up. Well, this time I'm going to select the filtered cigarettes, and you can see I'm selecting the same options there that I did before. So just come in, and look at the same menu options I did before. But I know further on down the problem - see here, it says, "Do the cigarette filters appear to be effective?" I'm going to have to compare the two graphs in order to get the answer to that question. I could just come in here into my options window and change everything up. Now I do the same thing for the filtered cigarettes. Now I need to go and do the same thing for the non-filtered - actually that was the non-filtered. And I just do it one after the other, and eventually that gets me everything I need for that. If there's no column there, then obviously the number I need to put in is zero. And you see I'm just coming down here and just taking that number off the top. 8 - 11 - similarly, there's nothing there. There's no column for that here, so I'm just going to press zero. So now all I've got to do is just match up the columns here with the columns here and take the numbers straight off the top. And the numbers on the tops of the bars represent the percentages that form our relative frequency distribution. Once I've done that, I hit Compute!, e viola! Here we have our relative frequency distribution. This will give us the numbers that we need to stick into our answer fields here in our assignment. And then the real kicker right here - check this box next to Value above bar. We want it as the order of the worksheet because that's going to match the order of the categories here in our assignment. We don't want to do it by, you know, whether the values are Counts Ascending or Descending. What this does is it gives us the columns in our relative frequency distribution according to the order that's in the worksheet. So we want to click on Percent under Type.Īnd then under Order By, we want to make sure that we select Worksheet. And notice here in your assignment, you're asked for percentages. But this is actually going to give you a number in decimal form. Down here under Type, it will be tempting to select Relative Frequency. So the first one that I make is for the non-filtered cigarettes, and then I select its frequency for the counts. Here in my options window, I'm going to select my categories.
You want to go up here to Bar Plot, and then you want to select With Summary because the data that we're given are frequency counts and not the actual data themselves. It might be tempting to come down here and select Histogram, but you don't want to do that because that's not going to give you what you need. OK, so in StatCrunch, to make a relative frequency distribution, you want to make the graphical portion. OK, here's my data in StatCrunch, and now I'm going to resize this window a bit so we can get a better view of everything that's going on.
Frequency table in stat crunch download#
Today I'm going to download this data here into StatCrunch. But I got a request to do this in StatCrunch, and so here we go.
Frequency table in stat crunch how to#
I've actually worked this problem out before in a previous post and video showing you how to do this in Excel, because I think Excel is a little bit quicker with this. And to do that, we need to take a look at the data that's being provided. OK, the first part of this problem asks us for our relative frequency distributions.
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