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This module is published by NCPEA Press and is presented as an NCPEA/Connexions publication. Each chapter has been peer-reviewed, accepted, and endorsed by the National Council of Professors of Educational Administration (NCPEA) as a significant contribution to the scholarship and practice of education administration. Formatted and edited in Connexions by Theodore Creighton, Virginia Tech and Janet Tareilo, Stephen F. Austin State University.

Writing up your parametric independent samples t

    About the Authors

  • John R. Slate is a Professor at Sam Houston State University where he teaches Basic and Advanced Statistics courses, as well as professional writing, to doctoral students in Educational Leadership and Counseling. His research interests lie in the use of educational databases, both state and national, to reform school practices. To date, he has chaired and/or served over 100 doctoral student dissertation committees. Recently, Dr. Slate created a website, Writing and Statistical Help to assist students and faculty with both statistical assistance and in editing/writing their dissertations/theses and manuscripts.
  • Ana Rojas-LeBouef is a Literacy Specialist at the Reading Center at Sam Houston State University where she teaches developmental reading courses. She recently completed her doctoral degree in Reading, where she conducted a 16-year analysis of Texas statewide data regarding the achievement gap. Her research interests lie in examining the inequities in achievement among ethnic groups. Dr. Rojas-LeBouef also assists students and faculty in their writing and statistical needs on the Writing and Statistical website, Writing and Statistical Help

The following is an example of how to write up (in manuscript text) your Parametric Independent Samples t test statistics. This module is used with a larger Collection (Book) authored by John R. Slate and Ana Rojas-LeBouef from Sam Houston State University and available at: Calculating Basic Statistical Procedures in SPSS: A Self-Help and Practical Guide to Preparing Theses, Dissertations, and Manuscripts

Elementary School Beginning Teacher Percentages and Teacher Salary: Accountability Rating Differences

Research questions

In this study, the following research questions were addressed:

  1. What is the difference in beginning teacher percentages between Exemplary elementary schools and Academically Unacceptable elementary schools?; and
  2. What is the difference in beginning teacher salary between Exemplary elementary schools and Academically Unacceptable elementary schools?

Results

The average percent of beginning teachers employed at Texas Exemplary elementary schools was 5.26%, compared to an average of 11.94% beginning teachers employed at Texas Academically Unacceptable elementary schools. Concerning the average teacher salary of beginning teachers, the mean salary was $40,080.06 for beginning teachers at Exemplary elementary schools whereas the mean salary was $38,414.98 for beginning teachers at Academically Unacceptable elementary schools. Readers are referred to Table 1 for the descriptive statistics concerning these variables.

Prior to conducting inferential statistics to determine whether differences were present between Exemplary and Academically Unacceptable elementary schools in their beginning teacher percentages and beginning teacher salaries, checks were conducted to determine the extent to which the data were normally distributed. Of the standardized skewness coefficients (i.e., the skewness value divided by its standard error) and the standardized kurtosis coefficients (i.e., the kurtosis value divided by its standard error), all were within the limits of normality, +/-3 (Onwuegbuzie&Daniel, 2002). Accordingly, parametric independent samples t -tests were conducted to answer the two research questions.

The independent samples t -test revealed a statistically significant difference between Exemplary elementary schools and Academically Unacceptable elementary schools in their percent of beginning teachers, t (49.46) = -4.58, p <.001. This difference represented a large effect size (Cohen’s d ) of 0.83 (Cohen, 1988). Academically Unacceptable elementary schools had a statistically significantly higher percentage of beginning teachers, more than twice as high, than did Exemplary elementary schools.

Regarding beginning teacher salary, the independent samples t -test revealed a statistically significant difference between Exemplary elementary schools and Academically Unacceptable elementary schools, t (50.47) = 2.11, p = .04. This difference represented a small effect size (Cohen’s d ) of 0.31 (Cohen, 1988). Exemplary elementary schools had a statistically significantly higher teacher salary for beginning teachers, $1,665.08 higher, than the beginning teacher salary at Academically Unacceptable elementary schools.

References

  • Cohen, J. (1988). Statistical power analysis for the behavioral sciences (2nd ed.) . Hillsdale, NJ: Lawrence Erlbaum.
  • Onwuegbuzie, A. J.,&Daniel, L. G. (2002). Uses and misuses of the correlation coefficient. Research in the Schools, 9 (1) , 73-90.
To be compliant with APA 6th edition, students and faculty are to be aware that Table titles are placed "above" the table entry. Titles here are placed below the tables because of special formatting templates and for conciseness of visual presentation.
Standardized Skewness Coefficients and Standardized Kurtosis Coefficients for Percent of Beginning Teachers and Average Salary of Beginning Teachers
Variable Standardized Skewness Coefficient Standardized Kurtosis Coefficient
Percent of Beginning Teachers
Exemplary 1.52 1.78
Unacceptable 2.52 1.34
Average Salary of Beginning Teachers
Exemplary -1.38 1.55
Unacceptable 1.92 0.57
Descriptive Statistics for Percent of Beginning Teachers and Average Salary of Beginning Teachers
Variable n M SD
Percent of Beginning Teachers
Exemplary 839 5.26 5.15
Unacceptable 49 11.94 10.13
Average Salary of Beginning Teachers
Exemplary 647 $40,080.06 $5,576.37
Unacceptable 44 $38,414.98 $5,027.47
Figures 1, 2, and 3 below came directly from SPSS output. As such, they are not compliant with APA 6th edition and should not be used in theses, dissertations, or manuscripts. Only Table 1 and 2above the Output from SPSS is compliant with APA format.

Spss statistical output

Figure 1. statistics

Figure 2. independent samples test for percent of beginning teachers

Figure 3. independent samples test for beginning teacher salary

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
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da
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Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
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da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
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what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
how did you get the value of 2000N.What calculations are needed to arrive at it
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Source:  OpenStax, Presenting and communicating your statistical findings: model writeups. OpenStax CNX. Apr 27, 2011 Download for free at http://cnx.org/content/col11299/1.3
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