There is disagreement among health care professionals about whether health care workers should wear finger rings while performing patient-related work. In particular, plain rings are presumed to have little impact on bacterial transmission by hand. Previous studies have shown that bacteria are transmitted by patient contact in about $25 \%$ of patient contacts where no ring is worn. Let $p$ denote the proportion of bacterial transmissions when a plain ring is worn. Investigators wish to determine whether the proportion of bacterial transmissions when wearing plain rings is greater than $0.25$.
a) What is the appropriate null hypothesis in this study?

b) What is the appropriate alternative hypothesis in this study?

c) In the context of this study, describe a Type I error and a Type II error.

Question

There is disagreement among health care professionals about whether health care workers should wear finger rings while performing patient-related work. In particular, plain rings are presumed to have little impact on bacterial transmission by hand. Previous studies have shown that bacteria are transmitted by patient contact in about $25 \%$ of patient contacts where no ring is worn. Let $p$ denote the proportion of bacterial transmissions when a plain ring is worn. Investigators wish to determine whether the proportion of bacterial transmissions when wearing plain rings is greater than $0.25$.
a) What is the appropriate null hypothesis in this study?

b) What is the appropriate alternative hypothesis in this study?

c) In the context of this study, describe a Type I error and a Type II error.

Quizplus · Accepted Answer

The Answer of There is disagreement among health care professionals about whether health care workers should wear finger rings while performing patient-related work. In particular, plain rings are presumed to have little impact on bacterial transmission by hand. Previous studies have shown that bacteria are transmitted by patient contact in about $25 \%$ of patient contacts where no ring is worn. Let $p$ denote the proportion of bacterial transmissions when a plain ring is worn. Investigators wish to determine whether the proportion of bacterial transmissions when wearing plain rings is greater than $0.25$.
a) What is the appropriate null hypothesis in this study?

b) What is the appropriate alternative hypothesis in this study?

c) In the context of this study, describe a Type I error and a Type II error.

There Is Disagreement Among Health Care Professionals About Whether Health 25%25 \%25%

There Is Disagreement Among Health Care Professionals About Whether Health $25 \%$