A study published, described how dogs were used in an attemptto identify patient
ID: 2913997 • Letter: A
Question
A study published, described how dogs were used in an attemptto identify patients having bladder cancer. A trial involved sixdifferent samples of urine from healthy people plus another sampleof urine from a person known to have bladder cancer. The dogs weretrained to identify the sample from the patient with bladdercancer. The trial was repeated 54 times with 22 correctidentifications and 32 wrong identifications. a. Given that each trial involved six healthy samples and onesample from a patient with bladder cancer, what is the probabilitythat a dog would select the cancer sample if it made a randomguess? A study published, described how dogs were used in an attemptto identify patients having bladder cancer. A trial involved sixdifferent samples of urine from healthy people plus another sampleof urine from a person known to have bladder cancer. The dogs weretrained to identify the sample from the patient with bladdercancer. The trial was repeated 54 times with 22 correctidentifications and 32 wrong identifications. a. Given that each trial involved six healthy samples and onesample from a patient with bladder cancer, what is the probabilitythat a dog would select the cancer sample if it made a randomguess?Explanation / Answer
Since there are seven choices and only one with cancer, theprobability is 1/7 in each trial.
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