SKS Sleep Study 4 Avg GPA 3.5 3 2.5 2 1.5 1 0.5 4 6 8 10 12 14 Hours of Sleep Fall GPA 2.
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.
A study conducted by students in an AP Psychology class
at South Kent School in CT discovered a
-0.38 between students’ hours of sleep (x) and GPAs (y).
The scatterplot below displays the relationship. What
conclusion can be reasonably drawn from these data?
higher GPAs.
B) If a student wishes to earn higher grades, he or she
should get more sleep.
relation, these data indicate that as students sleep
dict one another.
affect the value of the correlation.
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