Here is a data set summarized as a stem-and-leaf plot: 6# | 0022235678 7# | 0001233556677789 8# | 01289 9# | 156 How many data values are in this data set? n = What is the frequency of the modal class? (Hint: Modal class is the class/row with the highest freque frequency = How many of the original values are greater than 70? 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.
The number of values in the data set is obtained as follows:
Thus, the total number of values in the data set is 34.
The frequency of the modal class is obtained as below:
Modal class is the class/row with the highest frequency.
Here, the modal class is (7#) and the total number of leaves in that class is 16.
Thus, the frequency of the modal class is 16.
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