WEBVTT 00:00:00.000 --> 00:00:03.486 align:middle line:90% [MUSIC PLAYING] 00:00:03.486 --> 00:00:15.950 align:middle line:90% 00:00:15.950 --> 00:00:18.350 align:middle line:84% Hello, and welcome to a quick tutorial 00:00:18.350 --> 00:00:22.830 align:middle line:84% on how to run descriptive statistics using PSPP. 00:00:22.830 --> 00:00:26.464 align:middle line:84% I've gone ahead and opened up the textbook dataset.sav. 00:00:26.464 --> 00:00:28.130 align:middle line:84% I went ahead and opened the full version 00:00:28.130 --> 00:00:31.090 align:middle line:84% because I wanted to remind everyone that it's important 00:00:31.090 --> 00:00:33.380 align:middle line:84% that when you are analyzing that you don't use 00:00:33.380 --> 00:00:36.320 align:middle line:84% the items for your analysis, that you go all the way over 00:00:36.320 --> 00:00:39.089 align:middle line:84% to the right and we use these summed totals. 00:00:39.089 --> 00:00:41.630 align:middle line:84% For our purposes today, we're going to look at this one right 00:00:41.630 --> 00:00:42.129 align:middle line:90% here-- 00:00:42.129 --> 00:00:45.050 align:middle line:84% Big CA, which is the combined total 00:00:45.050 --> 00:00:47.370 align:middle line:90% for communication apprehension. 00:00:47.370 --> 00:00:48.710 align:middle line:90% So it's very easy to do this. 00:00:48.710 --> 00:00:52.380 align:middle line:84% We're going to go up to Analyze, Descriptive Statistics, 00:00:52.380 --> 00:00:54.260 align:middle line:90% Frequencies. 00:00:54.260 --> 00:00:56.840 align:middle line:84% Once this Frequencies pop-up up menu comes up, 00:00:56.840 --> 00:01:00.020 align:middle line:84% we're going to go, again, and find that big PRCA. 00:01:00.020 --> 00:01:02.379 align:middle line:84% So then scroll all the way to the bottom, 00:01:02.379 --> 00:01:04.670 align:middle line:84% and then you'll find-- there it is-- that communication 00:01:04.670 --> 00:01:05.637 align:middle line:90% apprehension total. 00:01:05.637 --> 00:01:07.970 align:middle line:84% Then I can click on that, and click the arrow to send it 00:01:07.970 --> 00:01:09.470 align:middle line:90% to the variables box. 00:01:09.470 --> 00:01:13.460 align:middle line:84% Right under that is the statistics box here in PSPP. 00:01:13.460 --> 00:01:16.610 align:middle line:84% Now it has some statistics pre-selected for you-- 00:01:16.610 --> 00:01:18.980 align:middle line:84% mean, standard deviation, minimum, and maximum. 00:01:18.980 --> 00:01:23.390 align:middle line:84% But you may want other ones, like skewness and range, 00:01:23.390 --> 00:01:28.530 align:middle line:84% Kurtosis, and the median just as a couple of examples. 00:01:28.530 --> 00:01:30.180 align:middle line:84% So these are some of the statistics. 00:01:30.180 --> 00:01:32.660 align:middle line:84% Now, I do want to point out a couple of things 00:01:32.660 --> 00:01:33.920 align:middle line:90% real fast before we move on. 00:01:33.920 --> 00:01:34.980 align:middle line:90% There is a Charts button. 00:01:34.980 --> 00:01:37.880 align:middle line:84% So if you had the desire to run bar graphs or pie charts, 00:01:37.880 --> 00:01:38.889 align:middle line:90% you can click on that. 00:01:38.889 --> 00:01:41.180 align:middle line:84% I do want to click on this one though-- the Frequencies 00:01:41.180 --> 00:01:42.020 align:middle line:90% Tables. 00:01:42.020 --> 00:01:43.640 align:middle line:84% All our frequency table does is it 00:01:43.640 --> 00:01:45.590 align:middle line:84% lets us know how many people have 00:01:45.590 --> 00:01:47.100 align:middle line:90% different individual scores. 00:01:47.100 --> 00:01:49.820 align:middle line:84% So like if someone got a 24 on the PRCA 00:01:49.820 --> 00:01:51.350 align:middle line:84% and another person got a 24, it's 00:01:51.350 --> 00:01:54.080 align:middle line:84% going to let us know that two people got a 24. 00:01:54.080 --> 00:01:56.840 align:middle line:84% When you're looking at basic descriptive statistics, not 00:01:56.840 --> 00:01:59.300 align:middle line:90% necessarily always that useful. 00:01:59.300 --> 00:02:02.060 align:middle line:84% For my personal purposes, I like to click on this button 00:02:02.060 --> 00:02:03.290 align:middle line:90% right here, which is Never. 00:02:03.290 --> 00:02:05.840 align:middle line:84% It just prevents that table from ever being popped up 00:02:05.840 --> 00:02:07.187 align:middle line:90% unless I actually want it. 00:02:07.187 --> 00:02:09.020 align:middle line:84% So I'm going to go ahead and click Continue, 00:02:09.020 --> 00:02:11.927 align:middle line:90% and now I can click on OK. 00:02:11.927 --> 00:02:13.760 align:middle line:84% And then you're going to get the output here 00:02:13.760 --> 00:02:17.060 align:middle line:84% for your basic descriptive statistics. 00:02:17.060 --> 00:02:18.690 align:middle line:84% You'll notice that we had, again, 00:02:18.690 --> 00:02:21.410 align:middle line:90% a total of 644 participants. 00:02:21.410 --> 00:02:22.606 align:middle line:90% 10 were missing. 00:02:22.606 --> 00:02:24.230 align:middle line:84% That means 10 people did not completely 00:02:24.230 --> 00:02:26.240 align:middle line:90% fill out the PRCA 24. 00:02:26.240 --> 00:02:29.060 align:middle line:90% The mean is 63.66. 00:02:29.060 --> 00:02:31.290 align:middle line:90% The standard deviation is 17. 00:02:31.290 --> 00:02:33.680 align:middle line:84% Kurtosis is positive, so it's going 00:02:33.680 --> 00:02:36.230 align:middle line:90% to have more peak-natured. 00:02:36.230 --> 00:02:38.480 align:middle line:84% Skewness is 0.20, which is positive, 00:02:38.480 --> 00:02:41.109 align:middle line:84% so it's going to be positively skewed. 00:02:41.109 --> 00:02:42.650 align:middle line:84% Then you're going to have your range. 00:02:42.650 --> 00:02:45.170 align:middle line:84% It's 96, which means that the lowest score, which 00:02:45.170 --> 00:02:48.140 align:middle line:84% was 24 and the highest score, 120, 00:02:48.140 --> 00:02:50.900 align:middle line:84% there are 96 points between those two. 00:02:50.900 --> 00:02:53.160 align:middle line:84% It also gives you the percentiles, or the 50 00:02:53.160 --> 00:02:56.192 align:middle line:90% for the median, which was 64. 00:02:56.192 --> 00:02:57.650 align:middle line:84% So that's all you have to do to run 00:02:57.650 --> 00:03:00.100 align:middle line:90% descriptive statistics in PSPP. 00:03:00.100 --> 00:03:03.150 align:middle line:90% [MUSIC PLAYING] 00:03:03.150 --> 00:03:14.326 align:middle line:90%