Question

Javier scored on a science test is equal to the upper quartile value of all the scores on the test.Based on the information,which statement is about Javier's score is most likely to be true ?

Answer 1

Upper quartile Q3 formula is expressed as shown;

Q3 = 3/4 (n+1)

Let assume the score is 100% in total;

substitute n = 100 into the formula;

Q3 = 3/4 (100+1)

Q3 = 3/4 (101)

Q3 = 303/4

Q3 = 75.75%

This means that the upper quartile must be greater than 75% since we arrived at a value greater than 75%, hence Javiers score is greater than 75% of all scores.e n =