A Study Is Conducted to Estimate the Prevalence of Catheter-Associated

A study is conducted to estimate the prevalence of catheter-associated urinary tract infection (CAUTI) in the intensive care unit (ICU) of an urban hospital.  The plot below shows the number of cases of CAUTI in this hospital during the month of July among patients in the ICU.  Based on the plot, which of the following is the number of prevalent cases on July 31?

A) 1
B) 4
C) 5
D) 8
E) 9

Correct Answer:

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