A nurse is attempting to determine if, among residents in a long-term care facil

Question

A nurse is attempting to determine if, among residents in a long-term care facility, pain ratings differ depending on the patient's level of consciousness. She randomly selects 15 residents, with 5 from each of the following groups:

·       level of consciousness of 3 (alert and oriented to person, place and time),

·       level of consciousness of 2 (alert and oriented to person and place),

·       level of consciousness of 1 (alert to person only).

The members of each group rate their pain 1 hour after receiving their pain medication, using the 0-10 pain numeric rating scale, 0 meaning no pain, 10 meaning the worst pain possible. Assuming an alpha level of 0.05, she uses an ANOVA to test the null hypothesis that pain rating does not differ depending level of consciousness, and obtains an F-value of 3. Will She retain or reject the null hypothesis?

Retain null

Reject null

Retain null

Reject null

Explanation / Answer

here as degree of freedom b/w groups =k-1=3-1=2

degree of freedom with in group =n-k=15-3=12

for above 2 and 12 degree of freedom and F value 3 ; p value =0.0878

as p vlaue is higher then 0.05 level

Retain null

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