The commute times (in minutes) of 30 employees are listed below 31 41 45 48 52 55 56 55 63 65 67 67 69 70 70 74 75 78 79 79 80 81 83 85 85 87 90 92 95 99 a) find the percentile of the commute time of 85 minutes. b) the 30th 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.
The commute times (in minutes) of 30 employees are listed below
31 41 45 48 52 55 56 55 63 65 67 67 69 70 70 74 75 78 79 79 80 81 83 85 85 87 90 92 95 99
a) find the percentile of the commute time of 85 minutes.
b) the 30th percentile is ____
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