From past experience, cycling’s drug testing body has found that 2% of professional cyclists have taken an illegal substance in the past 6 months. They have developed a test to help determine the presence of illegal substances in a cyclist. The test only produces positive or negative results. It turns out that 90% of cyclists that have taken an illegal substance in the past 6 months will test positive. Furthermore, only 1% of cyclists who did not take any illegal substance in the past 6 months will test positive. - What is the probability that a professional cyclist has taken an illegal substance in the past 6 months, if a positive test has resulted? It is?
1. From past experience, cycling’s drug testing body has found that 2% of professional cyclists have taken an illegal substance in the past 6 months. They have developed a test to help determine the presence of illegal substances in a cyclist. The test only produces positive or negative results. It turns out that 90% of cyclists that have taken an illegal substance in the past 6 months will test positive. Furthermore, only 1% of cyclists who did not take any illegal substance in the past 6 months will test positive.
- What is the probability that a professional cyclist has taken an illegal substance in the past 6 months, if a positive test has resulted? It is?
- The value of mean (u) is?
- The value of standard deviation is?
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