The data in the stem-and-leaf plot represents the difference in shipping costs for various packages compared to a competitor's company. Which statement describes the trend in the plot? Key: 3 30 = $3.30 Stem Leaf 78 1 14 56 22 97 3 28 73 85 92 4 17 28 93 02 18 36 61 92 99 O Some shipping costs are less than the competitor's. O Most shipping costs are only $1 greater than the competitor's. O The shipping cost is typically more than $3 greater than the competitor's. O The shipping cost differences are most commonly between $1 and $3.
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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