Richard W.

# how can I determine if there is a significant difference in 3 groups of 2 varibles?

3 different intensive care units
ICU 1 had 437 patients and 59 recieved an intervention
ICU 2       222                    77
ICU 3       762                    91

is there a difference in rate of use of the intervention among these ICUs?

Inyang N.

In order to find the difference of the variables I first subtracted the number of patients from the patients that were intervened

1.  ICU1->  437-59=378
2. ICU2-> 222-77= 145
3. ICU3 -> 762-91=671

Next, I subtracted the ICU difference to each unit
1. ICU1 (378) - ICU2 (145) = Was a difference of 233
2. ICU1 (378)- ICU3 (671)= 293
3. ICU3 (671) - ICU2 (145)= 526
I then subtracted the difference from each unit by the other units to get the remaining answers.
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03/10/15

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