DescriptiveStatistics Mean4.857802643Standard Error0.872236698Median3.2Mode1Standard Deviation4.777437152Sample Variance22.82390574Kurtosis2.10829171Skewness1.567625002Range18.45Minimum0.25Maximum18.7Sum145.7340793Count30 How to analize this date

From the above information we observe that, there are total 30 observation in the data set for which…

Answered: DescriptiveStatistics Mean…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The length of time people have worked at the Knoxville Garden Program is normally distributed with a mean of 9.3 years and a standard deviation of 2.6 years. The city wants to award a gift certificate to the top 25% of the people who work on that program. Using a TI 84 graphing calculator find: How many years of service are required to be in that top group? Be sure to show calculations and calculator commands used
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SAMPLE 1 MEAN 5.61 MEDIAN 5.6 MODE 5.6 STANDARD ERROR 0.39992384 STANDARD DEVIATION 2.1904731 SAMPLE VARIANCE 4.79817241 KUTOSIS -0.07445435 SKEWNESS -0.69709258 RANGE 7.9 MINIMUM 1.1 MAXIMUM 9 SAMPLE COUNT 30 SUM 168.3 SAMPLE 2 MEAN 7.326666667 MEDIAN 7.3 MODE 8.7 STANDARD ERROR 0.248717785 STANDARD DEVIATION 1.362283411 SAMPLE VARIANCE 1.855816092 KUTOSIS -0.118922156 SKEWNESS -0.015286932 RANGE 5.6 MINIMUM 4.6 MAXIMUM 10.2 SAMPLE COUNT 30 SUM 219.8 AND THIS IS MY t-TEST-ASSUMING EQUAL VARIANCE Variable 1 Variable 2 Mean 5.61 7.326666667 Variance 4.798172414 1.855816092 Observations 30 30 Pooled Variance 3.326994253 Hypothesized Mean Difference 0 df 58 t Stat -3.645067529 P(T<=t) one-tail 0.000286392 t Critical one-tail 1.671552762 P(T<=t) two-tail 0.000572783 t Critical two-tail 2.001717484 IS IT RIGHT THAT MY T-STAT CAME OUT AS A NEGATIVE, AND ARE MY CALCULATIONS…
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DescriptiveStatistics

Mean	4.857802643
Standard Error	0.872236698
Median	3.2
Mode	1
Standard Deviation	4.777437152
Sample Variance	22.82390574
Kurtosis	2.10829171
Skewness	1.567625002
Range	18.45
Minimum	0.25
Maximum	18.7
Sum	145.7340793
Count	30

DescriptiveStatistics Mean 4.857802643 Standard Error 0.872236698 Median 3.2 Mode 1 Standard Deviation 4.777437152 Sample Variance 22.82390574 Kurtosis 2.10829171 Skewness 1.567625002 Range 18.45 Minimum 0.25 Maximum 18.7 Sum 145.7340793 Count