Basic Statistics for Business and Economics ch 7
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What are the two families of continuous probability distributions? | show 🗑
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| show | The simplest distribution for a continuous random variable. This distribution is rectangular in shape and is defined by minimum and maximum values.
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| Mean of the Uniform Distribution (mu) = | show 🗑
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| Standard Deviation of the Uniform Distribution (sigma) = | show 🗑
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| show | 1/(b-a) [if x is between or equal to a and b]
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| show | Height * Base
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| show | It is bell-shaped and had a single peak at the center of the distribution. It is symmetrical about the mean. It falls off smoothly in either direction for the central values - it is asymptotic. Location of a normal distribution is determined by the mean.
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| Bell-Shaped | show 🗑
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| show | If the normal curve is cut vertically at the center value, the two halves will be mirror images.
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| show | The curve gets closer and closer to the X-axis but never actually touches it. The tails of the curve extend indefinitely in both directions.
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| The dispersion or spread of the distribution is determined by: | show 🗑
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| Standard Normal Probability Distribution | show 🗑
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| z Value | show 🗑
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| show | For symmetrical bell-shaped frequency distribution about 68% of the observations will lie within plus and minus 1 standard deviation of the mean; 95% of the observations will lie within 2 standard deviations, and 99.7% within 3 standard deviations.
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