5. Answer each of the following: The distribution of sample means for students taking the SAT exam has a population mean of u = 500 and a standard error of ơm = 200, a. What proportion of sample means for students taking the SAT would fall between the sample mean of M = 300 and a sample mean of M = 500? b. What sample means for students taking the SAT mark the middle 85% if the population mean was 500 and the standard error was 200?
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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