Problem: Suppose that IQ scores of 100 students has a bell-shaped distribution with a Mean of 100 and a standard deviation of 15, What percentage of people should have an IQ score more than 130? O a. 4.28% O b. 3.28% O c. 2.28% O d. 5.28%
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.
![Problem: Suppose that IQ scores of 100 students has a bell-shaped distribution with a Mean of 100 and a standard deviation of 15,
What percentage of people should have an IQ score more than 130?
O a. 4.28%
O b. 3.28%
O c. 2.28%
O d. 5.28%](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6cbac9c7-8177-4bf0-93ca-6b7652c538f2%2F9a36b517-28c4-43f5-a9e2-9e9064852ffd%2Ftm7ezy5_processed.png&w=3840&q=75)
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