Suppose a set of sample data has the following 5-number summary: MIN Q1 MEDIAN Q3 MAX 20 45 72 97 122 Which of the following statements is INCORRECT? Select one: a. 25% of the scores are below 72. b. The interquartile range (IQR) is 52. c. 75% of the scores lie between 20 and 97. d. 25% of the scores are above 97. e. 50% of the scores lie between 45 and 97.
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.
Suppose a set of sample data has the following 5-number summary:
| MIN | Q1 | Q3 | MAX | |
| 20 | 45 | 72 | 97 | 122 |
Which of the following statements is INCORRECT?
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