The following table shows the distribution of height of a group of redwood trees found in USA Table 4 Height (in feet) 179-182 183-186 No of redwood Trees 5 7 187-190 191-194 195-198 15 10 6 199-202 7 203-206 a. Compute the mean height, median height and standard deviation. b. Compute first quartile, third quartile and interquartile range c. Draw box plot
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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