Mathematics, 11.11.2019 03:31, madyson304
Aresearcher conducts an independent-measures study examining how the brain chemical serotonin is related to aggression. one sample of rats serves as a control group and receives a placebo that does not affect normal levels of serotonin. a second sample of rats receives a drug that lowers brain levels of serotonin. then the researcher tests the animals by recording the number of aggressive responses each of the rats display. the data are as follows. control low serotonin n = 10 n = 15 m = 14 m = 19 ss = 180.5 ss = 130.0 a. does the drug have a significant effect on aggression? use an alpha level of .05. show all 4 steps - you do not have to include formulas but must state hypotheses, critical value, pooled variance, standard error of m, t value, and decision to reject or fail to reject the null.
Answers: 3
Mathematics, 21.06.2019 14:00, ASTROBOY1
Do graduates from uf tend to have a higher income than students at fsu, five years after graduation? a random sample of 100 graduates was taken from both schools. let muf be the population mean salary at uf and let mufsu be the population mean salary at fsu. how should we write the alternative hypothesis?
Answers: 2
Mathematics, 21.06.2019 18:00, sammilower04
Write an equation in slope intercept form of the line passes through the given point and is parallel to the graph of the given equation (0,0); y=3/8 x+2
Answers: 1
Mathematics, 22.06.2019 01:20, corbeansbrain
Can you me with this question? i'll reward *30 points i just need with this one question so that i could solve the others. * edit: i originally set up the question to reward 30 points, but for some reason i can only reward 15. if you don't get 30, then i'm sorry. i'm still kind of new to this site
Answers: 1
Aresearcher conducts an independent-measures study examining how the brain chemical serotonin is rel...
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