1961 1998 Mean 18.8 20.7 Standard deviation 13.37 12.74 source: mlb. mlb.com
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.
to break the single season home run record of 61 home
ted to using performance enhancing steroids that sea-
son. Even so, how did McGwire’s performance really
1998 than in 1961. The table below shows the mean and
standard deviations for the number of home runs scored
by all players with at least 502 plate appearances in their
respective seasons. Use these to determine who’s home
run feat was more impressive.
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