Kcha+Wiki+Assignment+3

Name: Kevin Cha Date of Submission: December 5th 2010 (final checked) Due Date: December 6th, 2010 Date Assigned: November 8th, 2010 Block: G Wiki assignment 3 Page: 69# - 70# Data About Us Problem Number: 1~3 and Follow Ups 1~4

Page 69 Problem Number 1 Problem 1-a: Make a graph that shows the length of the 25 alligators and write a sentence describing the length shown in the graph.



There are one very big outlier and there are a lot of alligators that have length less than 189 inches. If the alligator's light, their length gets more smaller. Some of them are really big and some alligators are really small. If you see the length you might notice that if alligator's heavy that means they're probably big.

Page 70 problem 1-b, 1-c, 2-a, 2-b, 2-c, 3-a, 3-b-i-ii-iii, 3-c-i-ii-iii, 3-d, and follow ups 1~4 Problem: What are the mean of the median lengths of an alligator's length?

The mean of the alligator's length is 84.96 and the median is 85.

problem 1-c Problem: What is the range of the alligator's length?

The range is 58~147.

problem 2-a Make a graph of the weight of the 25 alligators and write a sentence describing the weights in the graph.

There were 3 big outlier. It was too big that I couldn't put it in the graph. The three outliers are 197, 366, and 640. There were lots of heavy alligators but some of them where kind of light compared to other alligators in this graph.

problem 2-b Problem: What are the median weight of the alligators and what is mode of the weight.

The mode weight of the alligator is 108.2 pounds and the median weight is 80 pounds.

problem 2-c Problem: What is the range of the weights of the alligator?

The range of the weights is 33-640 pounds.

problem 3-a Problem: Make a coordinate graph that shows the lengths and weights of the alligators.



problem 3-b-i-ii-iii Problem: What relationship can you see between length and weight for alligators that are i-61 and 63 inches long, ii-82,85, and 86 inches long, iii-90, 94, and 114 inches long?

i - I see that their weights smaller than other alligator. An alligator that's 61 inches long has more weight than alligator that's 63 inches long ii - I can see the alligator that's 85 inches long and 84 pounds and alligator that's 86 inches long but 83 pounds. Which has weird relationship with weight and lenght iii - I can see alligator with 114 inches is most heaviest and the shortest alligator (90 inches) is the most lightest.

problem 3-c-i-ii-iii Problem: What relationship can you see between length and weight for alligators that are i-70 inches long, ii 100 inches long, and iii-130 inches long?

i - I see that the alligator's weight is 70 pounds and it's 88 inches. ii - I see that the alligator's weight is 100 pounds so it's length should be about 80~90 inches. iii - I see that the alligator's weight is 130 pounds and it's length is 94 inches so I can see that the weight is about 1-20 lesser or bigger than height.

Follow ups 1-4

1. How can the mean and the median help you with describing the numbers in data set? If you know median, you can find out what is the middle-valued number in data set. Also, if you know mode, you can find the average number in data set. 2. How can the range help in describing the numbers in a data set? It help you know about how big or small the numbers are. 3. What kinds of numerical data are best displayed with? Line plots? Stem-and-leaf-plots? Coordinate graph? The numerical dat asre best displayed with stem-and-leaf-plots. 4. What does it mean to say that a person's armspan length is related to his or her height of somebody, or that the time it takes to travel to school is related to the distance traveled, or that the weight of an alligator is related to its lengths or not? It means that they have special relationship together.