4. A student discovers that her grade on a recent test was the 65tm percentile. If 320 students took the test, then approximately how many students received a lower grade than she did? а. 65 b. 112 с. 130 d. 208 е. 235
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.
![4. A student discovers that her grade on a recent test was the 65tm percentile. If 320 students took the test, then
approximately how many students received a lower grade than she did?
а. 65
b. 112
с. 130
d. 208
е. 235](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9e553849-bc7f-4408-b7ed-c6df7a0211b0%2Fc158f01f-505b-4663-b0e2-ca34cb3392e0%2Fkw2ba4a.png&w=3840&q=75)
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