A researcher wants to study the effectiveness of anxiety treatments in elderly patients. They design a study with 3 groups to which subjects are randomly assigned: a group where subjects receive 6 weeks of cognitive behavior therapy (CBT), a group where subjects receive 6 weeks of CBT and are also treated with alprazolam, and a group where subjects are put on a waitlist for 6 weeks (and therefore receive no treatment). The researcher recruited 120 older adults with a diagnosis of generalized anxiety disorder. They collected some basic demographic information from these adults, including sex, age, and education. At the end of the 6-week study, they administered the Beck Anxiety Inventory (BAI) to the adults to determine their anxiety levels and they also obtained FSIQ for all subjects. The researcher predicts that the CBT therapy will mitigate anxiety symptoms as compared to the waitlist (control) group and that the group that receives the CBT and alprazolam will have fewer anxiety symptoms than the CBT-only group. what is the null hypothesis?
A researcher wants to study the effectiveness of anxiety treatments in elderly patients. They design a study with 3 groups to which subjects are randomly assigned: a group where subjects receive 6 weeks of cognitive behavior therapy (CBT), a group where subjects receive 6 weeks of CBT and are also treated with alprazolam, and a group where subjects are put on a waitlist for 6 weeks (and therefore receive no treatment). The researcher recruited 120 older adults with a diagnosis of generalized anxiety disorder. They collected some basic demographic information from these adults, including sex, age, and education. At the end of the 6-week study, they administered the Beck Anxiety Inventory (BAI) to the adults to determine their anxiety levels and they also obtained FSIQ for all subjects. The researcher predicts that the CBT therapy will mitigate anxiety symptoms as compared to the waitlist (control) group and that the group that receives the CBT and alprazolam will have fewer anxiety symptoms than the CBT-only group.
what is the null hypothesis?
(- is it the waitlist group)
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