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 (x ) Cost(y ) 358 15.9 810 41.5 948 60.4 803 40.15 248 7.4 315 29.75 523 29.15 513 22.65 372 16.6 A student calculates a linear model y = x + . (Please show your answers to two decimal places) Use the model to estimate the cost when number of pages is 404. 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 (x |
|---|
| ) | Cost(y |
|---|
| ) | |
|---|---|
| 358 | 15.9 |
| 810 | 41.5 |
| 948 | 60.4 |
| 803 | 40.15 |
| 248 | 7.4 |
| 315 | 29.75 |
| 523 | 29.15 |
| 513 | 22.65 |
| 372 | 16.6 |
A student calculates a linear model
y = x + . (Please show your answers to two decimal places)
Use the model to estimate the cost when number of pages is 404.
Cost = $ (Please show your answer to 2 decimal places.)
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