Q1 // The following systolic blood pressures (in millimeters of mercury )were recorded for one individual over a period of several days. 112 128 118 127 133 119 110 117 133 112 127 123 132 123 117 124 115 126 134 114 125 132 132 136 131 a. Find the mean pressure P=P,In ,where P is the sum of all ,(n-25) values of pressure. %3! b. Find the standard deviation. (P-P) n-1
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!
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