2. 外语
  3. The figure above shows the probability distribution of a continuous random variable X. For each of the five intervals shown, the

The figure above shows the probability distribution of a continuous random variable X. For each of the five intervals shown, the

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问题
The figure above shows the probability distribution of a continuous random variable X. For each of the five intervals shown, the figure gives the probability that the value of X is in that interval. What is the probability that 1 < X < 4 ?
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答案0.76
解析 In the distribution shown, the interval from 1 to 4 is divided into the three intervals— the interval from 1 to 2, the interval from 2 to 3, and the interval from 3 to 4. The probability that 1 < X < 4 is the sum of the probability that 1 < X < 2, the probability that 2This explanation uses the following strategy.
Strategy 4: Translate from a Figure to an Arithmetic or Algebraic Representation
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