A study reported that finger rings increase the growth of bacteria on health-care workers' hands. Research suggests that 31 percent of health-care workers who wear rings have bacteria on one or both hands, and 27 percent of health-care workers without rings have bacteria on one or both hands. Suppose that independent random samples of 100 health-care workers wearing rings and 100 health-care workers not wearing rings are selected. What is the standard deviation of the sampling distribution of the difference in the sample proportions (wear rings minus does not wear rings) of health-care workers having bacteria on one or both hands?

Despite some evidence that suggest that finger ring use is associated with higher bacterial

colonization, healthcare providers continue to wear finger rings in a healthcare setting. The aim

of this systematic review was to synthesize the evidence to date regarding whether finger ring

use increases bacterial colonization of healthcare providers' hands. Articles that studied the

association finger ring use with hand hygiene and bacterial colonization were searched using

PubMed, Google Scholar, and Georgia State University's online library systems. The overall

results of this review suggest that finger ring use does increase the bacterial colonization on the

hands of HCPs but not with significant difference when compared to no finger ring use;

therefore, further research needs to be conducted to decide whether finger rings should be used in

a healthcare setting or not.

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d.) yes, because the volume of the cone is greater than the volume of the sphere

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