Question

David, a high school senior was wondering if the cost of attending college is worth the

expense. He collected the following data about annual salaries in thousands of dollars, for
college graduates and high school graduates.


idk the second place one help!​

Answer 1

D.

Explanation:

Explanation for part 1.

To find the mean, find total then divide by number of data set

For college salaries

Sum=41+67+53+48+45+60+59+55+52+52+50+59+44+49+52=786

Number of samples=15

Mean= 786/15 =52.4 * $1000=$52400

For High school salaries

Sum=23+33+36+29+25+43+42+38+27+25+33+41+29+33+35=492

Number of samples =15

Mean= 492/15 = 32.8 *$1000= $32800

College grads make more money according to the means.

Explanation for part 2.

Treat the data as part of coordinates and graph then on the same scale and axis to visualize the trend and make comparison.In this case, the graph for the line of best fit is linear as attached.