She was told that she needs to get plenty of sleep the night before the exam. She is interested in the relationship between the number of hours of sleep a student gets before the exam and the score earned on the exam. She collects information from 10 other appropriate? O No, there is no clear pattern in the residual plot. O Yes, there is no clear pattern in the residual plot. O No, the student who got the most sleep had a students who have already taken the exam as shown in the table. negative residual. O Yes, there are more negative residuals (6) than positive residuals (4). Amount of Score Sleep (Hours) 30 28 7.5 7.5 32 20 21 4 8.5 21 23 4.5 24 31
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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