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The MIT-BIT arrhythmia database contains 48 heart signal recordings with 22 and 26 from female and male patients, respectively. For a classification task, an analyst randomly selects 36 records for predictive model training and keeps the other 12 records for testing the model performance! (a) What is the expected number of female patient recordings selected for training?

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The expected number of female patient recordings selected for training is 16.5 (rounded to the nearest whole number).

To find the expected number of female patient recordings selected for training, we can use the concept of probability. The analyst randomly selects 36 records out of the total 48 records for training. Since 22 out of the 48 records are from female patients, the probability of selecting a female patient recording is 22/48. Therefore, the expected number of female patient recordings selected for training is (22/48) * 36 = 16.5 (rounded to the nearest whole number).

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