Assume that the systolic blood pressure of a 30 year old male is normally distributed with an average of 122 mmHg (millimeters of mercury) and a standard deviation of 10 mmHg. Calculate the probability that the average blood pressure of a randomly selected 30 year old male will be greater than 125 mmHg (nearest ten thousandth)
Continuous Probability Distributions
Probability distributions are of two types, which are continuous probability distributions and discrete probability distributions. A continuous probability distribution contains an infinite number of values. For example, if time is infinite: you could count from 0 to a trillion seconds, billion seconds, so on indefinitely. A discrete probability distribution consists of only a countable set of possible values.
Normal Distribution
Suppose we had to design a bathroom weighing scale, how would we decide what should be the range of the weighing machine? Would we take the highest recorded human weight in history and use that as the upper limit for our weighing scale? This may not be a great idea as the sensitivity of the scale would get reduced if the range is too large. At the same time, if we keep the upper limit too low, it may not be usable for a large percentage of the population!
Assume that the systolic blood pressure of a 30 year old male is
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