Statistics students in Oxnard College sampled 10 textbooks in the Condor bookstore, and recorded the number of pages in each textbook and its cost. The bivariate data is shown below, Number of Pages (x) Cost(y) 864 117.68 621 92.52 832 125.84 885 120.2 955 132.6 422 71.64 937 138.44 939 127.68 889 115.68 220 46.4
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.
| Number of Pages (x) | Cost(y) |
|---|---|
| 864 | 117.68 |
| 621 | 92.52 |
| 832 | 125.84 |
| 885 | 120.2 |
| 955 | 132.6 |
| 422 | 71.64 |
| 937 | 138.44 |
| 939 | 127.68 |
| 889 | 115.68 |
| 220 | 46.4 |
A student calculates a linear model
y= __?__ x + __?__ . (Please show your answers to two decimal places)
Use the model above to estimate the cost when number of pages is 320
Cost = $ __?__. (Please show your answer to 2 decimal places.)
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