# NOTES ON MATH CAMP LECTURES

```NOTES ON STAT CAMP LECTURE #1
How to Obtain the SPSS and EXCEL Outputs in Lecture 1
1. Make sure students have (a) installed the current version of SPSS on their computers
(you should have an install disk for SPSS in case a student needs to use this) and
(b) downloaded all of the data files they need for both my lectures and the afternoon
practice problems (you should have all of these files stored on a memory stick in
case the students need to get a copy).
2. Slide 17 (softdrink.xls)—in SPSS, use Analyze/Descriptive Statistics/Frequencies,
move “Brands Purchased” into the Variables Box and click OK to get the output.
Then show them that they can right click on the output and choose an appropriate
action (such as Edit Contents or copy and Paste Special as a Picture PGN). They can
also double click on the output to edit the contents.
3. Slide 19 (softdrink.xls)—in SPSS, use Graph/Legacy Dialog/Bar, move the variable
“Brands Purchased” to the Category axis, and then show the difference between
clicking N of Cases and % of Cases as well as double clicking on the graph to view
available actions.
4. Slide 21 (softdrink.xls)—in SPSS, use Graph/Legacy Dialog/Pie, and click on
Define. Then move the variable “Brands Purchased” into the Slice By box, click %
of Cases at the top, and click OK. Double click on output; then on the Elements
menu, click on Show Data Labels; on the resulting Properties menu, click on the
Text Style tab and change the Preferred Size value to 14 and click Apply; then click
on the Number Format tab and change the Decimal Places to 0 and click Apply.
Close the windows to get back to the revised SPSS Output. Then copy the pie chart
using ctrl C and paste it into a Word document using Paste Special (Picture PNG).
5. Slide 27 (audit.xls)—in SPSS, use Variable View to (a) remove columns V2 and V3
and (b) change Audit Time to Scale values in the last column, if necessary; then
return to Data View and close the error window. Then use Graphs/Legacy
Dialogs/Histogram and move Audit Time to the Variable box and click OK to get a
histogram. Then double click on the output to get the editing window. Then right
click on one of the vertical bars and click on Properties Window. In the resulting
menu, click on the Binning tab. Click Custom and change Number of Intervals to 5
and click Apply. Then close this window and the editing window to obtain the final
output.
6. Slide 28 (audit.xls)—in Excel, create the Bin Ranges: 14, 19, 24, 29, 34. Then click
Tools/Data Analysis/Histogram. Then fill in Input Range, Bin Range, Labels, Output
Range, Chart Output. Then right click on the vertical bars in the chart, select Format
Data Series and then (in the Options tab, if you have it) set Gap Width to 0 to make
the bars next to each other. Note that Excel does not provide percentages.
7. Slides 31, 33 (develop.xls)—in Excel, use Average to find the mean and Median to
find the median, and Mode to find the mode.
8. Slide 42 - 43 (salary.xls)—in Excel, use percentile(array, k) to illustrate how to
obtain the 50th (k = 0.5) and 85th (k = 0.85) percentiles. In SPSS, use
Analyze/Descriptive Statistics/Frequencies. Move Starting Salaries to Variables and
then click on Statistics and choose the percentiles, one at a time and Add them. Then
click Continue and OK.
9. Slide 45 (develop.xls)—in Excel, use Mode to find the mode.
10. Slide 46—do the Blood Problem as an in-class exercise using Excel.
11. Slide 49 (blood.xls)—erase everything but the data, and show them how to compute
the variance from the squared deviations, and also how to use VAR(range) and
VARPA(range) in EXCEL to get the sample and population variances.
12. Slides 55 (salary.xls)—in EXCEL, use tools/data analysis/descriptive statistics to get
all of the descriptive statistics and show them how to use built-in EXCEL functions
to make each of the computations (except for kurtosis and skewness) and indicate
that the standard error is the standard deviation / sqrt(n).
13. Slide 57 (salary.xls)—in SPSS, use Analyze/Descriptive Statistics/Frequencies, then
move Starting Salary to the Variables box. Then click on the Statistics box and
choose the statistics you want displayed.
14. Slide 60 (stereo.xls)—in EXCEL, first clear everything except the two columns of
data and select those columns (without the labels). Click on the Insert tab, then on
Scatter, and choose the plot in the upper left corner. Click on the resulting scatter
plot and then on the Layout tab. Then click on Chart Title to add a title at the top.
Then click on Axis Titles to add a horizontal title under the x-axis and a vertical title
next to the y-axis.
15. Slide 61 (stereo.sav)—in SPSS, use Graphs/Legacy Dialogs/Scatter. Put
Commercials on the x-axis and Sales on the y-axis and click OK.
16. Slide 64 (stereo.xls)—in EXCEL, show them how to compute the sample and
population covariance and correlation manually and how COVAR computes the
population covariance and CORREL computes the population correlation (= sample
correlation). In Excel 2010, COVARIANCE.S computes the sample covariance.
17. Slide 65 (stereo.sav)—in SPSS compute the sample correlation and covariance using
Analyze/Correlate/Bivariate and move both Sales and Commercials to the Variables
box. Then click on Options; select Cross-Product Deviations and Covariances; click
Continue and then click OK on the original menu.
```