3 please show work The following graph is an ogive of a in a

The following graph is an ogive of a in an ogive is the cumulative relative frequency and can also be interpreted as a percentile. Complete parts a through c. of a test score with a value of 120. A test score of 120 corresponds to theth percentle rank since this percentage of test scores are of 120. latest score with a value Percentle Ranks of Test Scores (b) Find and interpret the percentle rank of a test score with a value of 130 80 A test score of 130 corresponds to the th percentle rank since this percentage of test scores are of 130 (c) What score corresponds to the 20th percentile? 860 V a test score with a value 40- The 20th percentile corresponds to a test score of 70 90 110 130 150 1 Test Score Enter your answer in each of the answer boxes.

Solution

(a) The vertical line corresponding to test score 120 cut the curve at corresponding to 50th percentile line. It means 50% of students has test score less than equal to 120. So first blank is 50 and second is \"less than or equal to\" .

(b) The vertical line corresponding to test score 130 cut the curve at corresponding to 80th percentile line. It means 80% of students has test score less than equal to 130. So first blank is 80 and second is \"less than or equal to\" .

(c) The horizontal line corresponding to 20th percentile cut the curve at corresponding to 110 test score. So 20th percentile corresponds to a test score of 110.