iv Find the probability that at most 25 students score more than 31 marks Answer V Use the range rule of thumb to identify if
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.
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| SCORES | ||
| 16 | ||
| 23 | ||
| 29 | ||
| 33.5 | ||
| 36.5 | ||
| 17 | ||
| 24 | ||
| 30 | ||
| 34 | ||
| 38 | ||
| 19 | ||
| 26 | ||
| 31 | ||
| 34 | ||
| 38 | ||
| 19 | ||
| 27 | ||
| 31 | ||
| 34.5 | ||
| 38.5 | ||
| 20 | ||
| 27 | ||
| 32 | ||
| 34.5 | ||
| 39.5 | ||
| 22.5 | ||
| 27 | ||
| 33 | ||
| 35 | ||
| 39.5 | ||
| 41 | ||
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