Directions: Read, analyze and solve the problem correctly. Show your complete solution with illustration. Ms. Perez, a call center agent computed a u = 20, and the standard deviation o- 5 of the number of clients she assists in half of her working hours. Find the z value that corresponds to a score X = 12. Enrichment Activity 2: Complete Me! Find the area to the left of z = -1.5 Solution: Draw the normal curve and shade the required region Find the area that z = -1.5 corresponds to an area corresponds to the z-value Examine the graph and use probability notation to form the equation : The proportion of the area to the left of z = -1.5 is
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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