In some states, a driver of a vehicle may not use a handheld cell phone whlle driving. In one state with this law, 250 randomly selected drtvers were surveyed to determine the association between drivers who know the law and drivers who obey the law. The results are shown in the table below. Knows the Law Obeys the Law Yes No Total Yes 70% 12% 82% No 8% 10% 18% Total 78% 22% 100% What is the relative frequency of drivers who know the law? % of drivers who know the law.
Inverse Normal Distribution
The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.
Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.
Z-Scores
A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.
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