Here is a frequency distribution table (FDT) for a small data set: data value frequency 26 27 27 17 28 12 29 19 30 21 Find the following measures of central tendency. mean (¯x) = _____ (Please show your answer to one decimal place.) median = _____ (Please enter an exact answer.) mode = _____ (Please enter an exact answer.)
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.
Here is a frequency distribution table (FDT) for a small data set:
| data value | frequency |
|---|---|
| 26 | 27 |
| 27 | 17 |
| 28 | 12 |
| 29 | 19 |
| 30 | 21 |
Find the following measures of
mean (¯x) = _____ (Please show your answer to one decimal place.)
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