What test is performed when a need exists to compare more than two groups?
A. anova or F test
B. beta or B test
C. time or T test
D. sample of S test
Answer: A
Health Professions
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At what age is a cochlear implant contraindicated in children?
A. under 2 years old B. under 3 years old C. more than 5 years old D. not contraindicated in children, regardless of their age
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What happens during the exsufflation phase of mechanical insufflation-exsufflation?
1. Airway pressure is abruptly decreased to ?30 to ?50 cm H2O. 2. Negative airway pressure is maintained for 2 to 3 sec. 3. Peak expiratory "cough" flows reach near normal values. a. 1 and 2 only b. 2 and 3 only c. 1 and 3 only d. 1, 2, and 3
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