The college website shows the following information about the students. At the 0.05 significance level, test that enrollment (part time or full time) is independent of (has no relation to) semester (fall or spring). Fall 2018 Spring 2019 Part time 7427 8372 Full time 4061 3515
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.
The college website shows the following information about the students. At the 0.05 significance level, test that enrollment (part time or full time) is independent of (has no relation to) semester (fall or spring).
Fall 2018 Spring 2019
Part time 7427 8372
Full time 4061 3515
Null hypothesis:
Enrollment is independent of semester.
Alternative hypothesis:
Enrollment is not independent of semester.
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