15
The median is 13.5
25.5 is the median.
The median is 20. When a list has an even number of data, there is no one middle value, so instead you average the two middle values (in this case 18 and 22) to get the median.
15, 15, 20, 24, 25, 25, 30 Mode: 22 Median: 24
It is: 22.5
{| ! width="260" | 2009 Dates ! width="30" | Mon ! width="30" | Tues ! width="30" | Wed ! width="30" | Thurs ! width="30" | Fri ! width="30" | Sat ! width="30" | Sun | Jan. 2 - May. 2* 9:00 9:00 9:00 9:00 9:00 9:00 9:00 May. 3 - Jun. 20 09:00 23:00 12:15 12:15 23:00 12:15 23:00 12:15 23:00 18:30 12:15 Jun. 21 - Sep. 12 12:30 23:00 12:30 23:00 12:30 23:00 12:30 23:00 12:30 23:00 12:30 23:00 12:30 23:00 Sep. 13 - Oct. 10 09:00 23:00 12:15 12:15 23:00 12:15 23:00 12:15 23:00 18:30 12:15 Oct. 11 - Dec. 31 9:00 9:00 9:00 9:00 9:00 9:00 9:00 Note: There are no scheduled sailings on Dec 25, Jan 1, and Oct 10 (18:30 sailing)! width="260" | 2009 Dates ! width="30" | Mon ! width="30" | Tues ! width="30" | Wed ! width="30" | Thurs ! width="30" | Fri ! width="30" | Sat ! width="30" | Sun | Jan. 2 - May. 2* 16:30 16:30 16:30 16:30 16:30 16:30 16:30 May. 3 - Jun. 20 16:30 08:00 16:30 16:30 08:00 16:30 08:00 16:30 14:30 08:00 16:30 Jun. 21 - Sep. 12 08:30 16:30 08:30 16:30 08:30 16:30 08:30 16:30 08:30 16:30 08:30 16:30 08:30 16:30 Sep. 13 - Oct. 10 16:30 08:00 16:30 16:30 08:00 16:30 08:00 16:30 14:30 08:00 16:30 Oct. 11 - Dec. 31 16:30 16:30 16:30 16:30 16:30 16:30 16:30 Note: There are no scheduled sailings on Dec 25, Jan 1, and May 3 (08:00 sailing)Please Note: All departures are in Atlantic Time. Ferry crossing approximately 3 hours long. |}
24 is the median. There is no mode as both 25 and 15 appear the most amount of times. 15 is the range, as it is the difference between the highest and lowest values, which are 15 and 30
It is 17.
The median of a trapezoid is one half of the sum of the two sides. So EF is 1/2 (12+18) = 1/2 (30) = 15.
11:15 is 30 minutes before it. 12:15 is 30 minutes after it.
The median for this set is the average of 24 and 36, which is 30.
18 is the median of these numbers.