In a student survey, forty part-time students were asked how many courses they were taking this term. The (incomplete) results are shown below: Please round your answers to 4 decimal places. # of Courses Frequency Relative Frequency Cumulative Frequency 1 12 0.3 12 2 10 0.25 22 3 What percent of students take exactly three courses?
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.
In a student survey, forty part-time students were asked how many courses they were taking this term. The (incomplete) results are shown below:
Please round your answers to 4 decimal places.
| # of Courses | Frequency | Relative Frequency | Cumulative Frequency |
| 1 | 12 | 0.3 | 12 |
| 2 | 10 | 0.25 | 22 |
| 3 |
What percent of students take exactly three courses?
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