Question 1 150 steel workshops have the following distribution of average number of workers in varic hourly wage brackets: Wage Bracket: 500 – 600 600 – 700 700 – 800 800 – 900 900 – 100 Number of workshops: 17 28 72 21 12 Average Number of Workers per workshop: 15 11 9. 6. 5 Find the mean salary paid to the workers.
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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