The population average for SAT score is known to be 500 with a standard deviation of 100. this distribution is approximately normal. fifteen [15] high school student complete a preparation programme for taking the SAT test and obtain a mean score of 620. Did the students who took the SAT preparation programme obtain significantly greater score than the population mean? explain your answer.
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.
The population average for SAT score is known to be 500 with a standard deviation of 100. this distribution is approximately normal. fifteen [15] high school student complete a preparation programme for taking the SAT test and obtain a
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