ppose that the number of speed-related crash fatalities for the 15 U.S. states that had the highest numbers of these fatalities in a certain year is given below. State Speeding-RelatedTraffic Fatalities Texas 1,246 California 915 Pennsylvania 614 North Carolina 441 Illinois 388 Florida 361 New York 360 Ohio 355 Missouri 326 South Carolina 317 Arizona 298 Alabama 272 Virginia 271 Michigan 251 Oklahoma 217 (a) Calculate the mean number of speeding-related fatalities for these 15 states. (Round your answer to two decimal places.) fatalities (b) Calculate the median number of speeding-related fatalities for these 15 states. fatalities

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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.