Some notes on z - scores and t - scores
Journal Title: International Journal of Scientific Research and Management - Year 2015, Vol 3, Issue 4
Abstract
A symmetrical distribution of scores , where there is an equal number of scores above and below the midpoint, is called the normal curve. A measure of the variability of a distribution of scores is obtained by standard deviation. In order to standardize test scores, a researcher needs to have an idea about the standard deviation of the distribution of the raw scores. When raw scores are converted to standard scores, we say that the scores are “st andardized.” This process is useful as the individual raw scores are transformed into a standard form. Both z score and t - score are used in hypothesis testing. Generally, when standard deviation of the population is known and the sample size is above 30, we use z score, else, we use t - score. Basically, when we convert individual scores to standard form, we get z scores which are used to find out by from many standard deviations from the mean the result lies. Such scores are used extensively in educational and psychological fields as these are consistent across tests , making it easy for comparison of scores. This paper deals with some notes on z - scores and t - scores.
Authors and Affiliations
Sahana Prasad
Keywords
Related Articles
- EP ID EP216485
- DOI -
- Views 72
- Downloads 0
Evaluation of Anticancer Potentials of Bee Free Venom a nd Chitosan Nano - Conjugated One: In Vitro Study
Limited efficacy of the current first - line treatment for cancer cells leads to further development of efficient strategies. Recently, much attention has been given to nanoparticle - based drug delivery systems loaded w...
Identification of non - equilibrium growth for Bitcoin Exchange rate: Mathematical derivation method in Islamic Financial Engineering
Crptocurrency is a type of digital currency that using decentralized method for validating transaction. In the same time, the user of the Bitcoin is protected using hash algorithm. The value of Bitcoin is increased sharp...
Screening and Identification o f Cellulase - Producin g Bacteria Isolated From Rumen o f Camel i n Sokoto Main Abattoir
Cellulose is the most abundant polymers on the earth and was extensively used for many industrial purposes. The aim of the study was screening and isolation of cellulase producing bacteria from rumen of camel in slaughte...
A Well - Knit Agro Supply Chain As A Precursor To Growth And Development Of Horticulture
India loses a huge amount of horticulture produce every year specially fruits and vegetables. More 25 % ( Sri vastava and Kumar, 2010) horticulture produce goes to natural dustbin which is world’s highest spo...
Seed Sowing Using Robotics Technology
In India, near about 70% people are dependent upon agriculture. So the agricultural system in India should be advanced to reduce the efforts of farmers. Various number of operations are performed in...