If you have samples of n 1 equals 22 and n 2 equals 20, in performing the pooled-variance t test, you have 40 degrees of freedom.
The t-test method is a method where we analyze two sets of data which both these data are independent of each other. This pooled variance test helps us in getting the overall variance in both these different sample sets when we know that both the sample sets are almost equal.
To calculate degrees of freedom, we have the formula
df = n1 +n2 -2
According to the question, n1= 22 and n2= 20
Therefore, degree of freedom= 22 +20 -2 = 40
Hence, degree of freedom is 40.
To learn more about t-test, click
brainly.com/question/15870238
#SPJ4
Answer:
the answer is B. hope i could help yall :)
No because it is racist to assume that someone is a spy or is working for Japan just because they look Japanese
Answer:
Americans have different ideals of what is valuable for a better life.
Non-rapid-eye-movement sleep (NREMS), rapid-eye-movement sleep (REMS), and W are regulated by several Neurotransmitter systems and a number of diffusible or circulating factors.
Neurotransmitters are chemical messengers that your body can't function without. Their job is to carry chemical signals (“messages”) from one neuron (nerve cell) to the next target cell. The next target cell can be another nerve cell, a muscle cell or a gland.
The DA-containing cells of the VTA and SNc mission to the basal ganglia and the prefrontal cortex, even as these correspond to the PAG mission predominantly to the BFB and midline thalamus. moreover, OX-containing neurons bring projections to the entire forebrain and brainstem arousal structures. three as pointed out by using España and Scammell, four isolated activations of every of the arousal systems already provoke W. but, below regular situations, all of them participate in the occurrence of behavioral and electroencephalographic (EEG) arousal. This depends, in element, on the interconnections of maximum W-promoting structures. similarly, the systems that promote W inhibit neural structures located inside the brainstem and hypothalamus that promote and/or induce NREMS and REMS.
Learn more about Neurotransmitters here:- brainly.com/question/26387085
#SPJ4
