Question about T-test or ANOVA

1. A study is performed to compare several different pain reducing medications for the treatment of migraine headaches.The drugs tested are:Placebo, Tylenol, Excedrin, Imitrex.Four hundred migraine sufferers were recruited for the study and they were randomly assigned to one of the four groups and were given unmarked tablets to take when they had a migraine.The effectiveness of pain relief was documented with a survey and compared between groups.Which statistical test should be used to compare the pain relief effectiveness between the four groups?

	a.	Independent t-test
	b.	Dependent t-test
	c.	One way ANOVA
	d.	Repeated measures ANOVA

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Question about T-test or ANOVA

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