For the following data estimate the 65-th percentile, using ONLY the method shown in class: 18 20 15 56 33 31 44 56 35 78 69 56 64 34 47 33 72 28 46 55 The 65 -th percentile is: 49 54.5 55.5 57 None of the above
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.
For the following data estimate the 65-th percentile, using ONLY the method shown in class:
| 18 | 20 | 15 | 56 | 33 | 31 | 44 | 56 | 35 | 78 | 69 | 56 | 64 | 34 | 47 | 33 | 72 | 28 | 46 | 55 |
The 65 -th percentile is:
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49 |
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54.5 |
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55.5 |
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57 |
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None of the above |
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