Time: Temperature(F):
1:53am 35
2:53am 33
3:53am 32
4:53am 31
5:53am 31
6:53am 33
7:53am 31
8:53am 34
9:53am 38
10:53am 40
11:53am 42
12:53pm 45
1:53pm 45
2:53pm 46
3:53pm 46
4:53pm 46
5:53pm 45
6:53pm 44
7:53pm 43
8:53pm 42
9:53pm 42
10:53pm 41
11:53pm 41
12:53am 33
The high temperature for this day was 46 F and the low was 31 F. This is a range of 15 degrees. The average as calculated by taking the mean of all the temperatures is about 39.2 F. The average as calculated by taking the mean of the high and low temperature is 38.5 F. This is a percentage of difference of 2%. For this data set, that means that the two averages are relatively close and could be substituted. However, if the range of the temperatures was greater, this would not be the case. The graph below shows the temperature as well as some other weather features over the last three days.

The graph and statistics were used from:
"Weather Conditions for: Portland, Portland International Airport, OR." National Weather
Service. 23 Feb, 2014. Web. Accessed: 23 Feb. 2014.
http://www.wrh.noaa.gov/mesowest/getobext.php?wfo=pqr&sid=KPDX&num=72&raw=0