A company that sells copier machines has collected data from 45 recent calls on users to perform routine preventive maintenance service on its copiers; for each call, X is the number of copiers serviced and Y is the total number of minutes spent by the service person. The number of copiers serviced ranges from one to ten. A scatterplot of the data shows an ellipsoidal shape. The following summary statistics are obtained: X = 5.1. Sx 2.8. Y = 76.3 Sy = 42.7.r 0.98. What is the approximate value of the standard error for prediction, & ? Give a numeric %3D answer, rounded up to the nearest integer greater than or equal to your answer.
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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