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 data are shown below: Number of Pages (x) Cost(y) 704 111.52 594 89.22 701 113.13 670 98.1 805 107.65 790 111.7 983 136.79 540 78.2 701 100.13
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.
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 data are shown below:
| Number of Pages (x) | Cost(y) |
|---|---|
| 704 | 111.52 |
| 594 | 89.22 |
| 701 | 113.13 |
| 670 | 98.1 |
| 805 | 107.65 |
| 790 | 111.7 |
| 983 | 136.79 |
| 540 | 78.2 |
| 701 | 100.13 |
A student calculates a linear model using technology (Statistics Calculator or Computer)
ˆy= __?__ x+ __?__ . (Please show your answers to two decimal places)
Use the model to estimate the cost when number of pages is 859.
Cost = $ __?__ (Use the linear model with yor rounded coefficients and then round your answer to 2 decimal places.)
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