A study published, described how dogs were used in an attemptto identify patient

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. b. Given that the trial was conducted 54 times, what is theexpected number of correct identifications, assuming that randomguesses were made? 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. b. Given that the trial was conducted 54 times, what is theexpected number of correct identifications, assuming that randomguesses were made?

Explanation / Answer

1/7 = x/54 54/7 = x x = 54/7 x = 7.714 About 8 correct identifications if rounded up in randomguessing.

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