The following data represents the ages of 15 instructors at MPC: 28 39 35 42 61 46 62 56 55 28 59 50 38 59 36 What is the percentile rank of the data value 55 in the data set? Round your answer to the nearest whole number (whole percent). Percentile Rank of 55 = ____________ th percentile
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 following data represents the ages of 15 instructors at MPC:
| 28 | 39 | 35 | 42 | 61 | 46 | 62 | 56 |
| 55 | 28 | 59 | 50 | 38 | 59 | 36 |
What is the percentile rank of the data value 55 in the data set?
Round your answer to the nearest whole number (whole percent).
Percentile Rank of 55 = ____________ th percentile
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