Descriptive Statistics & Graphing Data (I4)
Sarah Martin
RES 341
September 1, 2010
Stephen Loro
Descriptive Statistics & Graphing Data (I4)
Research Problem:
The research problem is that the average commute time from point A to point B may vary based on origin and departure time.
Research Question:
Is there a difference in average commute time between AB and BA?
Data Collection
Trip  Travel Time (Min:Sec) 
 AB  BA 
1  14:25  16:24 
2  13:21  15:35 
3  14:26  14:45 
4  13:45  15:36 
5  12:45  14:55 
6  13:25  15:23 
7  13:50  14:54 
8  13:52  14:45 

Point A  463 West Monte Vista Ave, Vacaville, CA 
Point B  1636 New Jersey St, Fairfield, CA 
Distance  9.45 miles 14:30 minutes 
Statistical Methods:
The preceding data derived the following calculations using the descriptive statistics section of the Megastat tool in Microsoft Excel:
Descriptive statistics   
  
 AB  BA 
count  8  8 
mean  0.571962  0.636892 
sample variance  0.000545  0.000570 
sample standard deviation  0.023353  0.023871 
minimum  0.53125  0.61458333 
maximum  0.60138889  0.68333333 
range  0.07013889  0.06875 
  
standard error of the mean  0.008256  0.008440 
  
confidence interval 95.% lower  0.552438  0.616936 
confidence interval 95.% upper  0.591485  0.656849 
halfwidth  0.019523  0.019956 
  
skewness  0.359442  1.042170 
kurtosis  0.021423  0.720782 
coefficient of variation (CV)  4.08%  3.75% 
  
normal curve GOF   
pvalue  .3173  .3173 
chisquare(df=1)  1.00  1.00 
E  2.00  2.00 
O(0.67)  1  2 
O(+0.00)  2  2 
O(+0.67)  3  3 
O(inf.)  2  1 
Runs Plot:
Results:
The type of data collected that was collected for this research was qualitative discrete. Nominal intervals were...