Leonardo da Vinci, the renowned painter, speculated that an ideal human would have an arm span (distance from outstretched fingertip of left hand to outstretched fingertip of right hand) that was equal to his height. The following computer regression printout shows the results of a least-squares regression on height and arm span, in inches, for a sample of 18 high school students. Requried:
a. Write the equation for the least-squares regression line. Define any variables used.
b. Identify and interpret the slope.
c. Identify and interpret the y-intercept.
d. Find the correlation coefficient.

Two groups of students were asked how many hours they spent reading each day. the table below shows the numbers for each group: group a 1 2 1 1 3 3 2 2 3 group b 3 2 3 2 2 2 1 1 2 based on the table, which of the following is true? the interquartile range for group a students is 0.5 less than the interquartile range for group b students. the interquartile range for group a students is equal to the interquartile range for group b students. the interquartile range for group a employees is 0.5 more than to the interquartile range for group b students. the interquartile range for group a employees is 1 more than the interquartile range for group b students.