98,99,99,103,101,102,104,89,87,90,90
Find the 25th and 75th percentiles
Please arrange them in numerical order -- and then I'll help you.
See PsyDAG's answer this morning.
http://www.jiskha.com/display.cgi?id=1338854981
To find the 25th and 75th percentiles, you'll need to organize the numbers in ascending order. Here's the given set of numbers in ascending order:
87, 89, 90, 90, 98, 99, 99, 101, 102, 103, 104
To find the 25th percentile, you can use the formula:
25th percentile = (25/100) * (n + 1)
where "n" is the total number of observations in the dataset. In this case, "n" is 11.
25th percentile = (25/100) * (11 + 1) = 0.25 * 12 = 3
The 25th percentile corresponds to the third value in the sorted list, which is 90.
Similarly, to find the 75th percentile:
75th percentile = (75/100) * (n + 1)
75th percentile = (75/100) * (11 + 1) = 0.75 * 12 = 9
The 75th percentile corresponds to the ninth value in the sorted list, which is 102.
Therefore, the 25th percentile is 90 and the 75th percentile is 102.