Suppose that young adults own an average of three pairs of jeans. Survey eight people from your class. The class size is 30. Determine if the average is higher than three. Assume the population is normal. Ho=___ Ha=___ In words, define the random variable ___ =___ The distribution to use for the test is ____ Determine the test statistic using your data Draw a graph an label it appropriately. Shade the actual level of significance.
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!
Suppose that young adults own an average of three pairs of jeans. Survey eight people from your class. The class size is 30. Determine if the average is higher than three. Assume the population is normal.
Ho=___
Ha=___
In words, define the random variable ___ =___
The distribution to use for the test is ____
Determine the test statistic using your data
Draw a graph an label it appropriately. Shade the actual level of significance.
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