ed to determine the hours of sleep that college students get per nig The study surveyed 22 college students and obtained the following data: 8.1, 7.9, 7.9, 8.3, 7.7, 8.2, 8.3, 7.7, 8.1, 7.7, 8.3, 8.1, 8.2, 7.2, 8, 8.2, 8.3, 8, 8, 7.9, 9, 9 Assuming the population standard deviation is o = average hours of sleep per night that college students get. 0.5, construct a 98% confidence interval for the
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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