Marks obtained by 30 students in History of a Test Examination 2021 of some school are as follows: 34 36 10 2 31 32 22 43 48 36 48 22 39 26 34 39 10 17 47 38 40 51 35 52 41 32 30 35 53 23 Construct a frequency table with class intervals 10–19, 20–29 etc. Calculate the median and made from the frequency distribution.
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.
Marks obtained by 30 students in History of a Test Examination 2021 of some school are as follows:
34 36 10 2 31 32 22 43 48 36
48 22 39 26 34 39 10 17 47 38
40 51 35 52 41 32 30 35 53 23
Construct a frequency table with class intervals 10–19, 20–29 etc. Calculate the
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