Statistics Project, Part 5: Presentation

Statistics Project Part 3

Nasser Y Miranda

University of Phoenix

August 18th, 2018

Anova: Single Factor	Anova: Single Factor
SUMMARY	SUMMARY
Groups	Groups	Count	Sum	Average	Variance
Relationship	Supervisor	50	125	2.5	1.030612
Happiness	Happiness	50	370	7.4	2
ANOVA	ANOVA
Source of Variation	Source of Variation	SS	df	MS	F	P-value	F crit
Between Groups	Between Groups	600.25	1	600.25	396.1246	3.34E-36	3.938111
Within Groups	Within Groups	148.5	98	1.515306
Total	Total	748.75	99
	Tukey's HSD
	Difference	n (Relationship)	n (Happiness)	SE	q statistic
Relationship	4.9	50	50	1	4.9
Happiness	4.9	50	50	1	4.9

The Single factor one-way ANOVA is basically used to test whether the population means of observations of more than one treatment effects are equal (Brady, 2015). Since F > F crit the null hypothesis has to be rejected in this case. In this case, 396.1246 > 3.938111 thus we reject the null hypothesis in the sense that means for Happiness and Relationship are not equal. Post Hoc testing is useful in identifying the differences that are significant (Kuznetsova, Brockhoff, & Christensen, 2017). As opposed to the t-test, the ANOVA is useful in comparing means of more than two groups to test the hypothesis (Maurya, 2015). Moreover, since ANOVA goes to the extent of showing the statistical significance between the groups, it also reduces type I error (Keith, 2014).

References

Brady, S. M., Burow, M., Busch, W., Carlborg, Ö., Denby, K. J., Glazebrook, J., ... & Springer, N. M. (2015). Reassess the t test: interact with all your data via ANOVA. The Plant Cell, tpc-15.

Keith, T. Z. (2014). Multiple regression and beyond: An introduction to multiple regression and structural equation modeling. Routledge.

Kuznetsova, A., Brockhoff, P. B., & Christensen, R. H. B. (2017). lmerTest package: tests in linear mixed effects models. Journal of Statistical Software, 82(13).

Maurya, V. N., Jaggi, C. K., Vashist, S., Ogubazghi, G., Varshney, D. K., Maurya, A. K., & Arora, D. K. (2015). Impact of some significant factors for intern’s job satisfaction and performance using t-test and ANOVA method. American Journal of Biological and Environmental Statistics, Science Publishing Group, USA, 1(1), 19-26.