Suppose it is believed that the probability a patient will recover from a disease following medication is 0.9. In a group of twenty such patients, the number who recover would have mean and variance respectively given by (to one decimal place): What is the variance: I know how to calculate the mean but I can't figure out how to calculate the variance.
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.
Suppose it is believed that the probability a patient will recover from a disease following medication is 0.9. In a group of twenty such patients, the number who recover would have mean and variance respectively given by (to one decimal place):
What is the variance:
I know how to calculate the mean but I can't figure out how to calculate the variance.
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