65 68 71 74 77 80 83 Test Scores Use the Empirical Rule to answer the following questions. a. The mean is b. The standard deviation is c. % of the test scores are between 71 and 77. d. % of the test scores are between 68 and 80. е. % of the test scores are between 65 and 83. f. % of the test scores are between 74 and 77. g. % of the test scores are less than 74. h. % of the test scores are less than 77.
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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a. The
b. The standard deviation is?
c. % of the test scores are between 71 and 77.
d. % of the test scores are between 68 and 80.
e. % of the test scores are between 65 and 83.
f. % of the test scores are between 74 and 77.
g. % of the test scores are less than 74.
h. % of the test scores are less than 77.
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