WEBVTT

1
00:00:00.000 --> 00:00:04.493
Here is the problem: Data: 90, 85, 77.

2
00:00:04.943 --> 00:00:07.845
Measures of central tendency for a list of numbers.

3
00:00:08.646 --> 00:00:11.537
Sort the data from smallest to largest.

4
00:00:11.987 --> 00:00:15.435
Mean: add the values and divide by how many there are.

5
00:00:15.885 --> 00:00:22.410
Median: the middle value of the sorted list. With 3 values (odd), the median is value number 2.

6
00:00:22.860 --> 00:00:29.501
Mode: the value(s) that appear most often. Every value appears exactly once, so there is no mode.

7
00:00:30.301 --> 00:00:32.971
Range: largest minus smallest.

8
00:00:33.771 --> 00:00:42.583
So the answer is Mean equals 84; Median equals 85; Mode equals no mode; Range equals 13.

9
00:00:43.033 --> 00:00:52.913
The mean balances all values, the median splits the sorted data in half and is less affected by outliers, and the mode is the most common value.

10
00:00:53.713 --> 00:01:01.817
Sum 252 equals mean times n equals 84 times 3 equals 252.