Use a calculator or software to find the (a) Find the mean and standard devia MEAN: 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.
![Chapter 12: Problem 4
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(1 point) An outbreak of the deadly Ebola virus in 2002 and 2003 killed 91 of the 95 gorillas in 7 home ranges in the Congo. To study the spread
of the virus, measure" distance" by the number of home ranges separating a group of gorillas from the first group infected. Here are data on
distance and number of days until deaths began in each later group:
Distance z 1 5 4 5 6 8
317 30 45 48 50
Days y
Use a calculator or software to find the following values.
(a) Find the mean and standard deviation of z.
MEAN:
STANDARD DEVIATION:
(b) Find the mean and standard deviation of y
MEAN:
STANDARD DEVIATION:
(c) Find the correlation r between z and y.
Note: You can earn partial credit on this problem.
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