Professor Gatis Skride is hired by the Weightlifting Federation of Jeekabpils to study the body weights of lifters. He begins by measuring the body weights of the 39 lifters in the the light heavyweight class, which covers 213 - 225 pounders. He finds that the mean weight of the lifters is 219.05 pounds, that the median weight is 219 pounds, and that the mode is 219 pounds. He finds that most of the lifters weigh 218 - 200 pounds, and roughly the same number of lifters is more than 219 pounds as is less than 219 pounds. Does he have a normal distribution? Why or why not?
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.
Professor Gatis Skride is hired by the Weightlifting Federation of Jeekabpils to study the body weights of lifters. He begins by measuring the body weights of the 39 lifters in the the light heavyweight class, which covers 213 - 225 pounders. He finds that the
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