Examining the Distribution of Final Exam Scores 1
The UNIVARIATE Procedure
Variable: Final
Moments
N 12 Sum Weights 12
Mean 82.4166667 Sum Observations 989
Std Deviation 8.59659905 Variance 73.9015152
Skewness 0.22597472 Kurtosis -1.0846549
Uncorrected SS 82323 Corrected SS 812.916667
Coeff Variation 10.4306561 Std Error Mean 2.48162439
Basic Statistical Measures
Location Variability
Mean 82.41667 Std Deviation 8.59660
Median 81.50000 Variance 73.90152
Mode 80.00000 Range 26.00000
Interquartile Range 14.50000
Basic Confidence Limits Assuming Normality
Parameter Estimate Lower 90% CL
Mean 82.41667 79.03314
Std Deviation 8.59660 6.85984
Variance 73.90152 47.05738
Tests for Location: Mu0=80
Test -Statistic- -----p Value------
Student's t t 0.973825 Pr > |t| 0.3511
Sign M 1 Pr >= |M| 0.7539
Signed Rank S 8 Pr >= |S| 0.4434
Tests for Normality
Test --Statistic--- ------p Value------
Shapiro-Wilk W 0.952903 Pr < W 0.6797
Kolmogorov-Smirnov D 0.113328 Pr > D >0.1500
Cramer-von Mises W-Sq 0.028104 Pr > W-Sq >0.2500
Anderson-Darling A-Sq 0.212693 Pr > A-Sq >0.2500 |
Examining the Distribution of Final Exam Scores 3
The UNIVARIATE Procedure
Variable: Final
Normal Probability Plot
97+ *++
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71+ * ++
+----+----+----+----+----+----+----+----+----+----+
-2 -1 0 +1 +2
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