Q7: The concentration of nicotine... The concentration of nicotine was measured in a random sample of 40 cigars. The data are displayed below, from smallest to largest: 72, a5, 110, 124, 137, 140, 147, 151, 158, 163, 164, 165, 167, 168, 169, 169, 170, 174, 175, 175, 179, 179, 182, 185, 186, 188, 190, 192, 193, 197, 203, 208, 209, 211, 217, 228, 231, 237, 246, 256. How many outliers do we have in this dataset?
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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