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In a city where 30% occupants are foreign, the probability of a foreign being questioned is 40%, while for a local is 10%. What is the likelihood that any person chosen at random will be questioned.

Need to know the test that will be performed on the following question: The data comprises hours devoted to patient care per week for practitioners in conventional and alternative medical practices. Question: Can we infer that the mean amount of time devoted to patient care per week by...