Relationship of T-test and Effect Size
Not what you're looking for?
Can you explain the data what are the assumptions of correlated groups t test provided?
1.What are the assumptions of a correlated groups t test?
2.What measure of effect size is used for a correlated-groups t test?
3.The student decides to conduct the same study using a within-participants design in order to control for differences in cognitive ability. He selects a random sample of participants and has them study different material of equal difficulty in both the music and no music conditions. The data appear below. As before, they are measured on an interval ratio scale and are normally distributed.
Music
6, 7, 6, 5, 6, 8, 8
No music
10, 7, 8, 7, 7, 9, 8
A what statistical test should be used to analyze these data?
B Identify Ho and Ha for this study
C Conduct the appropriate analysis
D Should Ho be rejected? What should the researcher conduct
e. If significant, compute the effect size and interpret
f. If significant, draw a graph representing the data.
4. The formula is N-1 instead of N+N-2 where N is the number of participants in one group or in one sample. The way the null hypothesis is stated is also different.
Also, one advantage of the correlated-groups t test over the independent-groups t-test is that is reduces the error variance due to individual differences.
Which one do you prefer?
Purchase this Solution
Solution Summary
The solution gives detailed steps on solving a couple of statistical questions on t-test for two independent sampes and two dependent sampes and effect size.
Purchase this Solution
Free BrainMass Quizzes
Know Your Statistical Concepts
Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.
Measures of Central Tendency
Tests knowledge of the three main measures of central tendency, including some simple calculation questions.
Measures of Central Tendency
This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.
Terms and Definitions for Statistics
This quiz covers basic terms and definitions of statistics.