The American College Health Association - National College Health Assessment survey,' was administered at 44 colleges and universities in Fall 2011 with more than 27,000 students participated in the survey. Students in the ACHA-NCHA survey were asked "Within the last two weeks, how many times have you had five or more drinks of alcohol at a sitting?" The results are given in the table below. Is there a significant difference in drinking habits depending on gender? Show all details of the test. Male Female Total 5402 13,310 || 18,712 1– 2 2147 3678 5825 3 – 4 912 966 1878 5 + 495 358 853 Total 8956 18,312 27,268
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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