Research Methods lecture 6 and 7 Slides
... How likely is it that these two samples (the pink and the blue) were taken from the SAME population? [this is called the NULL HYPOTHESIS] ...
... How likely is it that these two samples (the pink and the blue) were taken from the SAME population? [this is called the NULL HYPOTHESIS] ...
Chapter 8. Inferences about More Than Two Population Central
... We need to verify that these conditions are satisfied prior to making inferences from the analysis of variance table. – The normality condition is not as critical as the equal variance assumption when we have large sample sizes unless the populations are severely skewed or have very heavy tails. – T ...
... We need to verify that these conditions are satisfied prior to making inferences from the analysis of variance table. – The normality condition is not as critical as the equal variance assumption when we have large sample sizes unless the populations are severely skewed or have very heavy tails. – T ...
Populations
... Previously collected data – even on a similar but not identical variable – is useful. The “Range Rule of Thumb” can be useful in generating an educated guess for the standard deviation. To ensure the error margin, guess conservatively (too high). If you are too conservative, you will oversample (cos ...
... Previously collected data – even on a similar but not identical variable – is useful. The “Range Rule of Thumb” can be useful in generating an educated guess for the standard deviation. To ensure the error margin, guess conservatively (too high). If you are too conservative, you will oversample (cos ...
#29 a) skewed right means there are a few instances where groups
... e) when the p-value is less than alpha we reject the hypothesis so if alpha goes from .01 to .05 it is easier to reject Ho. So if you can reject it more often you are more likely to reject a false null hypothesis which is good so that power must increase. f) since power is a good thing and it is goo ...
... e) when the p-value is less than alpha we reject the hypothesis so if alpha goes from .01 to .05 it is easier to reject Ho. So if you can reject it more often you are more likely to reject a false null hypothesis which is good so that power must increase. f) since power is a good thing and it is goo ...
S 2
... – Two job designs are being considered for the production of a new computer desk. – Two samples are randomly and independently selected • A sample of 25 workers assembled a desk using design A. • A sample of 25 workers assembled the desk using design B. • The assembly times were recorded ...
... – Two job designs are being considered for the production of a new computer desk. – Two samples are randomly and independently selected • A sample of 25 workers assembled a desk using design A. • A sample of 25 workers assembled the desk using design B. • The assembly times were recorded ...
