Ima Student
Psych 6430
30 August, 2001
Personal Data Set: MBASchool Tuition Charges and Entry Level Salaries
The experimental[KLW1] units for this analysis were schools offering MBA programs. The data, for the year 1999, were available at I [KLW2]collected data on the following variables: tuition charged by the schools (TUITION[KLW3]), the salaries of entry-level graduates (SALARY), whether the school required a laptop or not (LAPTOP), and whether the school offered a fast-track or accelerated program (FAST). TUITION and SALARY were continuous variables that were both measured in dollars (US), while LAPTOP and FAST were dichotomous variables, both coded ‘0’ for schools without a laptop requirement or accelerated program or ‘1’ for schools with a laptop requirement or accelerated program. No data measurements were difficult to believe, but had I obtained incredulous values, I would have recorded them as missing values as in the case of a ‘7’ appearing in the LAPTOP or FAST columns.
Originally, I expected that schools with a laptop requirement would have graduates who commanded higher salaries and also charge higher tuition than schools without such an elitist requirement. I also expected that schools with a fast-track or accelerated program would have graduates who either commanded high or low salaries and who graduated from schools charging a correspondingly high or low tuition. This hypothesis was based on the fact that there are certainly prestigious schools, like DukeUniversity, whose fast-track program graduates both command a very high salary and pay a hefty tuition compared to ECU, whose fast-track graduates both command a low salary and pay lower tuition. That is, you expected the groups to differ in variance.
I sorted the data by whether or not the school had a fast-track accelerated MBA program. For schools that do not have accelerated programs, salaries varied from a low of $44,600 to a high of $89,348 while tuition varied from $3,300 to $29,800 per student per year. The salaries for students completing fast-track programs provided a similar range, though from a low of $46,000 to a high of $86,000 while the tuition at these schools provided a more narrow range of a low of $5,640 to a high of $27,900 compared to schools without fast-track programs.
The means and medians for schools with fast-track programs at $57,323 and $16,097 respectively were lower than the corresponding mean and median for schools without fast-track programs, with $64,962 and $17,096 respectively. Salary and tuition had platykurtic distributions in the not fast track group, and there was some evidence of positive skewness in the distribution of salary in the fast track group. The 95% confidence levels indicate that schools with fast track programs generally have lower tuition charges and graduate students who earn lower salaries compared to schools that do not have fast track programs. See my annotations below.
------
BJ's PDS Program 1
30 August, 2001
------Fast=0 not fast track------
The MEANS Procedure
Variable Mean Median Std Dev Minimum Maximum Skewness
ƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒ
Salary 64961.81 65000.00 11967.83 44600.00 89348.00 0.0505043
Tuition 17095.82 17148.00 7088.81 3300.00 29800.00 0.0367179
ƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒ
Lower 95% Upper 95%
Variable Kurtosis CL for Mean CL for Mean
ƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒ
Salary -0.9046628 62169.51 67754.11
Tuition -1.0867317 15441.88 18749.76
ƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒ
Notice that the confidence intervals for the mean salary do not overlap with one another.
------Fast=1 fast track------
Variable Mean Median Std Dev Minimum Maximum Skewness
ƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒ
Salary 57323.27 52045.50 11797.72 40000.00 86000.00 0.7507736
Tuition 16097.27 14439.00 6129.32 5640.00 27900.00 0.3201485
ƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒ
Lower 95% Upper 95%
Variable Kurtosis CL for Mean CL for Mean
ƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒ
Salary -0.2245199 52917.92 61728.61
Tuition -0.6522452 13808.54 18385.99
ƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒƒ
SAS code should appear here
Return to the PDS assignment
[KLW1]Should indent the first line of each paragraph. "Research units" would be more appropriate, given that no variable was manipulated.
[KLW2]Probably best not to use first person here, since it was not you would gathered the data.
[KLW3]APA frowns on such use of capitalization, but I think it appropriate here.