SPSS_Summary_Statistics_p(2)

SPSS_Summary_Statistics_p(2) - SPSS Summary Statistics Our...

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SPSS Summary Statistics Our first topic of statistical analysis is the method we use to derive tables of summary statistics from SPSS for Windows. For this purpose we choose the data obtained for Questions 3 in the questionnaire we used for the previous section, which is the likelihood of the respondents buying a packet of Woolworth dog biscuit at $15 per packet. The answers are given in a scale from 0, which means that the respondent will definitely not buy it, to 10, which means that the respondents will definitely buy it. To obtain our summary statistics using Frequencies analysis, from the menus choose: Analyze Descriptive Statistics Frequencies. .. The following dialogue box appears. On the left hand side, you will see a list of all of the variables that you have defined. We select 'likelihood of buying': Now click on the right arrow near the middle of the dialogue box. You will see that the variables have now been taken to the Variables list on the right hand side of the dialogue box.
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Now click on the Statistics button. A dialogue box called "Frequency: Statistics" comes up in which you can select quite a large number of calculations of summary statistics that you can request your computer to do on your data. Here we have selected the mean, standard deviation, median, minimum, maximum and mode etc. . Click on the continue button to return to the original dialogue box. Another button that you can click on is the Charts button, which draws up a dialogue box named "Frequencies: Chart." Here you can ask the computer to draw from you data a variety of graphs. Here we have selected Pie charts.
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Click on Continue to confirm and leave. Then, after you have returned to the original dialogue box, click on the OK button, which runs all of the calculations and graphs that you have asked for. The output for the summary statistics calculations are in a file called Output1. You will see that a frequency distribution table has been constructed for 'likelihood of buying' and that all of the summary statistics selected are shown above the frequency distribution table. The summary statistics are: Statistics likelihood of buying Valid 25 N Missing 0 Mean 5.56 Median 6.00 Mode 2 Std. Deviation 3.042 Variance 9.257 Minimum 1 Maximum 10 25 2.50 50 6.00 Percentiles 75 8.50
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The center of the distribution can be approximated by the median (or second quartile) 6.00, and half of the data values fall between 2.5 and 8.5, the first and third quartiles. The mean is quite close to the median, suggesting that the distribution is symmetric. Let’s look first at the frequency distribution table as shown below. The first column is called value label. This column is empty because our data for Question 3 can be left as a score out of 10 without further explanation for our interpretations; therefore we have not and need not define what each of the numbers in the input mean in the Value
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This note was uploaded on 01/15/2010 for the course MKT mkt3010C taught by Professor Alan during the Fall '08 term at CUHK.

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SPSS_Summary_Statistics_p(2) - SPSS Summary Statistics Our...

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