Identify the null and alternative hypothesis in the following scenario.
To determine if battery 1 lasts longer than battery 2, the mean lasting times, of the two competing batteries are compared. Twenty batteries of each type are randomly sampled and tested. Both populations have normal distributions with unknown standard deviations.
Select the correct answer below:
Refer to the Journal of Applied Psychology (Jan. 2011) study of the determinants of task performance. In addition to
Suppose you take independent random samples from populations with means
Give the name of the distribution and any parameters needed to describe it.