Jham+Assignment+3

Wiki Assignment 3 Date of Submission: November 14th 2010 Assigned Date: November 8th 2010 Due Date: December 6th 2010 Making Graphs using Technology: Data About Us Looking Back and Looking Ahead; pg. 69 and 70

1. a. Make a graph about the 25 alligators' length and write a sentence describing the length of the alligators shown in the graph.

I think they numbered this gators this way because to show the pattern go UP and down.

1.b. What is the median and the mean length? The mean: 74+94+85+61+128+72+89+90+63+82+114+69+86+88+58+90+94+68+78+86+72+74+147+76+86= 2063. Then 2124/25= 84.96. And 84.96 is the mean of the gator's length. The median: 58,61,63,68,69,72,72,74,74,76,78,82,85,86,86,88,89,90,90,94,94,114,128,147. Then I crossed numbers out I got 85 as my median.

1.c. What is the range of this data? the range is: 58~147 or 89.

2.a. Make a graph about the alligators weight and write a sentence describing the graph. 2.b. What is the median and the mean of the graph? The mean: 54+110+84+44+366+61+84+106+33+80+197+36+83+70+28+102+130+39+57+80+38+51+640+42+90=2705/25=108.2 The Median: 28,33,36,38,39,42,44,51,53,57,61,70,80,80,80,83,84,90,102,106,110,130,197,366,640. Then I crossed out the numbers and I got 80 as my median.

2.c. What is the range of this data? It is 28~ 640 or 612.

3.a. Make a cordinate graph about the length and the weight's data. 3.b. What relationship do the number have between the length and the weight of alligators that are: i. 61 and 63 inches long:That their weight is divisible by 11 ii. 82,85 and 86 inches long: It is similar to the length. Like 82 in. is 80. iii. 90,94 and 114 inches long: They are heavier than their length

3.c. What weight would you predict for: i. 70 inches long: something around 50 lb. ii. 100 inches long: something around 160 lb. 130 inches long: something around 540 lb.

3.d. Based on the study that you did on the length and the weight, do you think it is possible to make a good estimate the weight if you know the alligator's length? I think yes it is possible, because you can just look at the alligator's length and compare with another alligator that is the same length and what it's weight is then you can predict what the weight it might be.

1. How does //mean// and //median// help to describe a number set? It give you more information about the number set. Not only mean and the median helps, the range and the mode also might help to describe a number set. The person who reads the number data, and if you already have the mean and the median for him then he will get more information about the data. And it will also give that person what the middle number of the data is and what the average is.

2. How does //range// help to describe a number set? As I said above, it gives you more information about the data set. It also gives the person that is reading the graph what the lowest number is and what the highest number is and when he/she making a graph with the number set, then she/he will know what the distance will be and the lowest number and the highest number in the graph should be.

3. What kinds of number data are best displayed with: a. Line plot: When there are sets of numbers and there is the mode and all. b. stem and leaf plots: When there are 2 number data and you want to compare them. c.coordinate graph: When the number data has 2 number together.

4. What does it mean when a person's arm span is //related// to his or her height or the time it takes to travel to school is //related// to the distance traveled, or the weight of an alligator is //related// to its length? When you are saying something is //related// something means that they are comparing between 2 different things and how they are different. Relationship between 2 objects or things are connections or difference between them