Given the following frequency distribution: CLASS FREQUENCY 10 - 14 04 15 – 19 12 - 20- 24 16 25 - 29 08 30- 34 17 35– 39 13 40 – 44 15 45 – 49 05 TOTAL 90 How many students scored more than 29.5? O 58 O 40 O 50 О 32
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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