In the example provided, the quartiles are:
25% = 16.5 (the median of {15, 16, 17, 18})
50% = 18.5 (the median of {15, 16, 17, 18, 19, 20, 21, 22})
75% = 20.5 (the median of (19, 20, 21, 22})
The 25th multiple of 15 is 375.
28 is the 3rd quartile.
To find the 1st quartile (Q1) of the sample group, first, arrange the numbers in ascending order: 15, 20, 25, 25, 27, 28, 30, 34. Since there are 8 values, Q1 is the median of the first half of the data. The first half is 15, 20, 25, 25, and the median of this subset is (20 + 25) / 2 = 22.5. Thus, the 1st quartile is 22.5.
1.5
50 is 100*50/15 percent of 15. That is 333.33... recurring %.50 is 100*50/15 percent of 15. That is 333.33... recurring %.50 is 100*50/15 percent of 15. That is 333.33... recurring %.50 is 100*50/15 percent of 15. That is 333.33... recurring %.
Alaska Pacific University's 2014 25th-75th percentile ACT scores are 15-22 on the English section, 15-25 on the Math section, and 15-23 Composite.
Gallaudet University's 2014 25th-75th percentile ACT scores are 13-19 on the English section, 15-19 on the Math section, and 15-20 Composite.
Tougaloo College's 2014 25th-75th percentile ACT scores are 14-21 on the English section, 15-19 on the Math section, and 15-20 Composite.
Alabama State University's 2014 25th-75th percentile ACT scores are 14-19 on the English section, 15-18 on the Math section, and 15-19 Composite.
Lyndon State College's 2014 25th-75th percentile ACT scores are 13-23 on the English section, 15-20 on the Math section, and 15-22 Composite.
Mississippi Valley State University's 2014 25th-75th percentile ACT scores are 14-19 on the English section, 15-17 on the Math section, and 15-19 Composite.
Bethany College's 2014 25th-75th percentile ACT scores are 15-22 on the English section, 16-22 on the Math section, and 16-22 Composite.
Claflin University's 2014 25th-75th percentile ACT scores are 16-20 on the English section, 14-21 on the Math section, and 15-20 Composite.
Presentation College's 2014 25th-75th percentile ACT scores are 15-23 on the English section, 17-24 on the Math section, and 17-23 Composite.
Rivier College's 2014 25th-75th percentile ACT scores are 14-21 on the English section, 15-19 on the Math section, and 17-22 Composite.
Rust College's 2014 25th-75th percentile ACT scores are 11-16 on the English section, 15-16 on the Math section, and 13-17 Composite.
Wesley College's 2014 25th-75th percentile ACT scores are 13-21 on the English section, 15-21 on the Math section, and 16-23 Composite.