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 (xx) Cost(yy) 911 108.32 958 113.96 545 70.4 202 22.24 564 77.68 875 110 882 118.84 422 46.64 753 102.36 A student calculates a linear model yy = + xx. (Please show your answers to two decimal places) Use the model to estimate the cost when number of pages is 542. Cost = $ (Please show your answer to 2 decimal places.)
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 bivariate data are shown below:
| Number of Pages (xx) | Cost(yy) |
|---|---|
| 911 | 108.32 |
| 958 | 113.96 |
| 545 | 70.4 |
| 202 | 22.24 |
| 564 | 77.68 |
| 875 | 110 |
| 882 | 118.84 |
| 422 | 46.64 |
| 753 | 102.36 |
A student calculates a linear model
yy = + xx. (Please show your answers to two decimal places)
Use the model to estimate the cost when number of pages is 542.
Cost = $ (Please show your answer to 2 decimal places.)
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