In a study of 450,900 cell phone users, it was found that 200 developed cancer of the brain or nervous system. Assuming that cell phones have no effect, there is a 0.000493 probability of a person developing cancer of the brain or nervous system. We therefore expect about 223 cases of such cancer in a group of 450,900 people. Estimate the probability of 200 or fewer cases of such cancer in a group of 450,900 people. What do these results suggest about media reports that cell phones cause cancer of the brain or nervous system? (a) P(xs 200) = (Round to four decimal places as needed.)
Compound Probability
Compound probability can be defined as the probability of the two events which are independent. It can be defined as the multiplication of the probability of two events that are not dependent.
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Probability theory is a branch of mathematics that deals with the subject of probability. Although there are many different concepts of probability, probability theory expresses the definition mathematically through a series of axioms. Usually, these axioms express probability in terms of a probability space, which assigns a measure with values ranging from 0 to 1 to a set of outcomes known as the sample space. An event is a subset of these outcomes that is described.
Conditional Probability
By definition, the term probability is expressed as a part of mathematics where the chance of an event that may either occur or not is evaluated and expressed in numerical terms. The range of the value within which probability can be expressed is between 0 and 1. The higher the chance of an event occurring, the closer is its value to be 1. If the probability of an event is 1, it means that the event will happen under all considered circumstances. Similarly, if the probability is exactly 0, then no matter the situation, the event will never occur.
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