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|
DESCRIPTIVE STATISTICS: GROUPED DATA |
|
Confidence
Level |
95.000% |
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Strength of Concrete |
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Significance
Level |
5.0% |
|
Grouped
data for histogram from Cusens and Wettern, 1959, in Alfredo H-S. Ang and
Wilson H. Tang, Probability Concepts in Engineering
Planning and Design, Vol. 1 ( New York, NY:
John Wiley & Sons, 1975), pp. 276-277. |
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|
t(α/2,n-1) |
1.976810963 |
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Observations |
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Group Limits |
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Number of
Observations |
143 |
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Minimum |
6 |
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Number of
Groups |
8 |
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Maximum |
10 |
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|
Optimal
Number of Groups [Sturges' Rule] |
8.159871337 |
|
Range |
4 |
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Interval Midpoint |
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Group Frequencies |
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Mean |
7.479895105 |
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Minimum |
7 |
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Median |
7.439516129 |
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Maximum |
31 |
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Mode |
7.4375 |
|
Range |
24 |
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|
Geometric
Mean |
7.456757423 |
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|
Harmonic
Mean |
7.434333272 |
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Population |
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Sample |
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|
Population
Standard Deviation |
0.598959316 |
|
Sample Standard Deviation |
0.601064627 |
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|
Population
Variance |
0.358752262 |
|
Sample Variance |
0.361278686 |
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|
Coefficient
of Variation |
0.080075898 |
|
Coefficient of Variation |
12.00029342 |
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|
Standard
Error of the Mean |
0.050087494 |
|
Standard Error of the Mean |
0.050263549 |
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|
95% Confidence Interval for Population Mean |
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95% Confidence Interval for Sample Mean |
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|
Lower
Limit |
L |
7.380881597 |
|
Lower
Limit |
L |
7.38053357 |
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|
Upper
Limit |
U |
7.578908613 |
|
Upper
Limit |
U |
7.57925664 |
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|
Quartiles,
Deciles, Percentiles |
|
|
95%
Confidence Interval for Population Mean |
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Symmetry |
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|
Quartiles,
Deciles, Percentiles |
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|
Skewness |
0.889485942 |
|
Lowest |
Q0 |
D0 |
P0 |
6 |
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|
Standard
Error of Skewness (SES) |
0.202731198 |
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P1 |
6.119166667 |
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|
Skewness
Test Statistic (Skewness/SES) |
4.387513874 |
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P5 |
6.595833333 |
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|
Distribution's
Deviation from Symmetry |
Extended to Right |
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D1 |
P10 |
6.827941176 |
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Peakedness |
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Q1 |
|
P25 |
7.110795455 |
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|
Kurtosis |
4.80472287 |
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Median |
Q2 |
D5 |
P50 |
7.439516129 |
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|
Standard
Error of Kurtosis (SEK) |
0.402792267 |
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Q3 |
|
P75 |
7.753125 |
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|
Excess
Kurtosis |
1.80472287 |
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D9 |
P90 |
8.094444444 |
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|
Kurtosis
Test Statistic (Excess Kurtosis/SEK) |
4.480530084 |
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P95 |
8.491666667 |
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|
Shape of
Distribution's Peak |
Leptokurtic |
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P99 |
9.693571429 |
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|
Distribution's
Degree of Peakedness |
Near Normal |
|
Highest |
Q4 |
D10 |
P100 |
10 |
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|
Inter-Quartile Range |
Q3-Q1 |
0.642329545 |
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Correlation |
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|
Correlation
(Pearson) CORR(τ,O) |
-0.28943636 |
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Population Moments |
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|
Bar Lengths as % of Maximum |
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|
m1 |
-9.93766E-17 |
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m2 |
0.358752262 |
|
Confidence
Inteval for Mean |
100% |
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m3 |
0.191130968 |
|
Percentiles |
15% |
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|
m4 |
0.618383138 |
|
Mode |
100% |
|
|
Copyright © 2010 by Macroknow Inc. All Rights
Reserved. |
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