Statistics students in Oxnard College sampled 9 textbooks in the Condor bookstore and recorded the number of pages in each textbook and its cost. The bivariate data are shown below: Number of Pages (r) Cost(y) 583 71.96 958 136.96 740 108.8 757 99.84 817 110.04 910 121.2 890 114.8 865 120.8- 880 123.6 A student calculates a linear model (Please show your answers to two decimal places) y = Use the model to estimate the cost when number of pages is 459. Cost = S (Please show your answer to 2 decimal places.) %3D
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.
Let y be a dependent variable and x be an independent variable.
To estimate the regression model, calculate the means and standard deviations for x and y as
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