Question

Statistics students in Oxnard College sampled 11 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)
315	54.35
810	98.9
834	98.06
628	76.52
613	64.17
978	110.02
505	67.45
567	74.03
543	75.87
851	91.59
408	49.72

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 401.
Cost = $ (Please show your answer to 2 decimal places.)

Answer 1

The statistical software output for this problem is:

From above output:

Linear model:

y = 0.09 x + 20.52

Predicted cost = $ 56.62