a.Use range-rule-of-thumb to calculate the standard deviation: 113.3, 115.2, 116.8, 116, 116.2, 114.3, 112.8, 115.7 b.Given a sample set having a variance of 16, estimate the range. c.Given: 49, 52, 52, 52, 74, 67, 55, 55. Find the first quartile, Q1. d.Given: 49, 52, 52, 52, 74, 67, 55, 55. Find the third quartile, Q3.
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.
1
a.Use
b.Given a sample set having a variance of 16, estimate the range.
c.Given: 49, 52, 52, 52, 74, 67, 55, 55. Find the first
d.Given: 49, 52, 52, 52, 74, 67, 55, 55. Find the third quartile, Q3.
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