A student council consists of 15 students. (a) In how many ways can a committee of seven be selected from the membership of the council? (b) Two council members always insist on serving on committees together. If they can't serve together, they won't serve at all. How many ways can a committee of seven be selected from the council membership? (c) Suppose the council contains eight men and seven women. How many committees of six contain three men and three women?
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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