Range=Max value-Min Value h=R/m m=no of classes The following scores represent the final examination grades for an elementary statistics course: 23, 60, 79, 32, 57, 74, 52, 70, 82, 36, 80, 77, 81, 95, 41, 65, 92, 85, 55, 76, 52, 10, 64, 75, 78, 25, 80, 98, 81, 67, 41, 71, 83, 54, 64, 72, 88, 62, 74, 43, 60, 78, 89, 76, 84, 48, 84, 90, 15, 79, 34, 67, 17, 82, 69, 74, 63, 80, 85, 61 (a) Construct a Frequency Distribution Table with suitable class Intervals. (b) Construct a relative frequency histogram; draw a Histogram with Frequency Polygon.
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.
h=R/m m=no of classes
The following scores represent the final examination grades for an elementary statistics course:
23, 60, 79, 32, 57, 74, 52, 70, 82, 36, 80, 77, 81, 95, 41, 65, 92, 85, 55, 76, 52, 10, 64, 75, 78, 25, 80, 98, 81, 67, 41, 71, 83, 54, 64, 72, 88, 62, 74, 43, 60, 78, 89, 76, 84, 48, 84, 90, 15, 79, 34, 67, 17, 82, 69, 74, 63, 80, 85, 61
(a) Construct a Frequency Distribution Table with suitable class Intervals.
(b) Construct a relative frequency histogram; draw a Histogram with Frequency
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