Suppose that, for a certain exam, a teacher grades on a curve. It is known that the mean is 60 and the standard deviation is 5. There are 40 students in the class. (Round your answers to the nearest whole number.) (a) How many students should receive a C? 28 student(s) (b) How many students should receive an A? 0.05 student(s)
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.
Suppose that, for a certain exam, a teacher grades on a curve.
It is known that the mean is 60 and the standard deviation is 5. There are 40 students in the class. (Round your answers to the nearest whole number.)
28 student(s)
(b) How many students should receive an A?
0.05 student(s)
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