3- Rise in Tides Shown here is a frequency distribution for the rise in tides at 30 selected locations in the United States. Rise in tides (inches) Frequency 6. 12.5–27.5 27.5–42.5 3 42.5–57.5 5 57.5–72.5 8 72.5–87.5 87.5–102.5 2 Find each of these. a. Mean b. Modal class c. Variance d. Standard deviation
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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