D. Find the value of Pearson coefficient r. Give your conclusion about the variables of the studies. 1. The diameter of the longest lichens growing on gravestones were measured. Data gathered show the following: Age of gravestone X (years) 9 18 20 31 44 52 53 61 63 63 Diameter of lichen 35 22 28 32 2 3 4 20 22 41 2. In a biology experiment a number of cultures were grown in the laboratory. The numbers of bacteria, in millions, and their ages, in days, are given below. Age X (days) 5 6 7 8 2 3 4 No. of bacteria 34 106 135 181 192 231 268 300 Y(mil)
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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