Exam 3 Review - Chapter 9 Flashcards
1
Q
How do you calculate the estimated standard deviation (s) ?
A
- subtract the mean from each score
- square results
- add results
- divide by degrees of freedom (N-1)
- find the square root
2
Q
What is a t distribution?
A
What is used in place of a z distribution if a population standard deviation is not present.
3
Q
How do you find degrees of freedom?
A
Subtract 1 from the population.
4
Q
What does the one sample t test assume?
A
- scale DV
- nominal IV
- random assignment
- normal distribution
5
Q
How do you turn t statistics back into raw means for confidence intervals?
A
+/-t(sm) + M sample
6
Q
How to find Cohen’s d for a one sample t test?
A
(sample - population) / estimated standard deviation
