The average SAT score is 1061 with a standard deviation of 186. The distribution of all SAT scores is known to be normally distributed. Use the Empirical Rule to address the following questions. Hint: sketch the distribution to help visualize the problem. Approximately 95% of the test scores lie between 875 X and 1247 If 340,000 students took the SAT, approximately how many students scored between 875 and 1247? If 340,000 students took the SAT, approximately how many students scored between 503 and 1619? Question Help: DVideo Submit Question
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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