3. Find the 10th and 90th percentiles and the first and third quartiled for the time difference between the schedule and actual arrival times for the Atlanta airline data provided. Use thw formula nk/100 + 0.5, the excel percentile inc function and the rank rank and percentile tool, and compare the results. (See picture) Using the formula the 10th percentile is ____ and the 90th percentile i. _____
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.
3. Find the 10th and 90th percentiles and the first and third
Using the formula the 10th percentile is ____ and the 90th percentile i. _____
Given information:
Arrange the given data in ascending order:
-30, -27, -20, -18, -17, -17, -17, -13, -12, -11, -9, -8, -3, -3, -3, 6, 7, 7, 8, 9, 14, 14, 14, 15, 19, 23, 26, 28, 34, 35, 38
Use the given formula to determine 10th and 90th percentile:
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