An electronics superstore is carrying 70" TV for the upcoming Christmas holiday sales. The weekly demand is normally distributed with an average of 63 units and a standard deviation of 9 units. Compute the standard deviation of the total demand over 9 weeks sales period. Enter your answer with ONE decimal point.
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!
An electronics superstore is carrying 70" TV for the upcoming Christmas holiday sales. The weekly demand is
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