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) 313 49.04 836 80.88 762 66.96 221 26.68 ns 325 47 965 92.2 re 312 41.96 223 22.84 589 57.12 urse A student calculates a linear model (Please show your answers to two decimal places) Use the model to estimate the cost when number of pages is 430. Cost = (Please show your answer to 2 decimal places.) Submit Question
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.
Use EXCEL to obtain the regression equation.
EXCEL procedure:
- Go to EXCEL
- Go to Data>Data Analysis.
- Choose Regression.
- Input Y range as $B$1:$B$10.
- Input X range as $A$1:$A$10.
- Check the option Labels in First row.
- Click OK.
EXCEL output:
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