Question

the bar graph on the right shows some possible scores from the program for international student assessment, a test for 15 - year - olds. the scale was constructed so that an average score is 500. (a) which country had the highest math score shown? hong kong estimate the score. (b) which country had the lowest math scores shown? mexico estimate the score. (c) estimate the difference between the scores for the country with the highest math score shown and with the lowest math score shown.

Explanation:

Step1: Identify highest - scoring country

By observing the bar graph, Hong Kong has the highest math score. Estimate its score visually. It seems to be around 570.

Step2: Identify lowest - scoring country

Mexico has the lowest math score. Estimate its score visually. It seems to be around 420.

Step3: Calculate the difference

Subtract the lowest score from the highest score. $570 - 420=150$.

Answer:

(a) Hong Kong
(b) Mexico
(c) 150