Cholesterol levels: A national health survey measured the serum HDL cholesterol levels in a large number of women. Following isa sample of 40 HDL levels (in milligrams per deciliter) that are based on the results of that survey. The list has been sorted into numencal order. 25 25 26 27 27 27 28 31 33 33 34 35 35 35 36 37 39 42 43 46 46 47 48 50 50 51 52 53 53 54 56 59 60 64 73 75 77 80 81 83 Send data to Excel Part 1 of 2 (a) what is the 21 percentile? The 21 percentile is Part 2 of 2 (b) What is the 72d percentile? The 72 percentile is
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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