Grouped Frequency Distribution to the given data is Class Limits Class Boundaries Tally Frequency 5- 101 4.5 - 101.5 17 102 – 198 101.5 – 198.5 199 – 295 198.5 – 295.5 296 – 392 295.5 – 392.5 || 2 393 – 489 392.5 - 489.5 || 2 490 – 586 489.5 – 586.5 3 587 - 683 586.5 - 683.5 1 684 - 780 683.5 – 780.5 || 2 Use the grouped frequency distribution table that you have already done (in Tutorial No. 1) to calculate the following: (1) Mean (2) Median (3) Mode Notes: 1) Write first your frequency distribution table before your answer. 2) Use table in your 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.
ELEMENTARY STATISTICS
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