43 49 55 61 67 73 79 Test Scores Use the Empirical Rule to answer the following questions. a. The mean is 61 b. The standard deviation is 6 C. 68 % of the test scores are between 55 and 67. d. 95 % of the test scores are between 49 and 73. е. 99.7 % of the test scores are between 43 and 79. f. 34 % of the test scores are between 61 and 67. g. % of the test scores are less than 61. h. % of the test scores are less than 67.
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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