Aprakash+Assignment+3

ANAHITA PRAKASH

Date Of Submission: December 5, 2010 Due Date: December 6, 2010 Date Assigned: November 8, 2010 Math 6 Block E Wiki Assignment 3 Making Graphs Using Technology: Data About Us Looking Back and Looking Ahead: Page 69-70

__1 a - Make a graph that shows the length of the 25 alligators and then write a sentence describing the lenghts of the gators.__


 * Gator Number || Length (Inches) ||
 * 1 || 74 ||
 * 2 || 94 ||
 * 3 || 85 ||
 * 4 || 61 ||
 * 5 || 128 ||
 * 6 || 72 ||
 * 7 || 89 ||
 * 8 || 90 ||
 * 9 || 63 ||
 * 10 || 82 ||
 * 11 || 114 ||
 * 12 || 69 ||
 * 13 || 86 ||
 * 14 || 88 ||
 * 15 || 58 ||
 * 16 || 90 ||
 * 17 || 94 ||
 * 18 || 68 ||
 * 19 || 78 ||
 * 20 || 86 ||
 * 21 || 72 ||
 * 22 || 74 ||
 * 23 || 147 ||
 * 24 || 76 ||
 * 25 || 86 ||
 * 25 || 86 ||



I think that these gators are pretty big...the biggest is 147 in. and the smallest is 58 in. But most of them are around 85 in.

__1b - Write down the median and mean of the lengths of the gators.__

median- 85.0 i found this out by first ordering all the numbers from smallest to greatest and then one by one, eliminating one from each side.

mean- 84.96 i found out the mean by adding up all the data and then dividing that number by the number of data points there were so my mean is 84.96

__1c - Write down the range of this data set .__

range- 58-147 i know this because the lowest data point is 58 and the highest is 147.

__2 a - Make a graph that shows the weights of the alligators. Then, write a sentence describing them.__


 * Gator Number || Weight ( pounds ) ||
 * 1 || 54 ||
 * 2 || 110 ||
 * 3 || 84 ||
 * 4 || 44 ||
 * 5 || 366 ||
 * 6 || 61 ||
 * 7 || 84 ||
 * 8 || 106 ||
 * 9 || 33 ||
 * 10 || 80 ||
 * 11 || 197 ||
 * 12 || 36 ||
 * 13 || 83 ||
 * 14 || 70 ||
 * 15 || 28 ||
 * 16 || 102 ||
 * 17 || 130 ||
 * 18 || 39 ||
 * 19 || 57 ||
 * 20 || 80 ||
 * 21 || 38 ||
 * 22 || 51 ||
 * 23 || 640 ||
 * 24 || 42 ||
 * 25 || 90 ||
 * 25 || 90 ||



This data goes from 28 to 640 for the weight. I would say that most gators have the weight from 30 to 95.

__2 b - Write down the mean and median.__

median- 80.0 i found this out by ordering the data from smallest to greatest and then crossing out one by one to get one remaining number.

mean - 108.2 i know this because i added up all the data and then divided that number by the number of data points there are.

__2 c - Write down the range.__

range - 28 - 640 i know this because the lowest data point is 28 and the highest is 640.

__3 a - Make A Scatterplot of the lengths and weights of each alligator__

__3 b - Write down what you see iin common with the alligators length and weight of :__

__i : 61 and 63 inches long :__

I noticed that the one with 63 inches long has a weight that is almost have the size of its length and the one with 61 inches long, has a weight about 1 1/2 times its length.

__ii : 82, 85, and 86 inches long :__

i noticed that all three of their lengths are almost as big as their weights.

__iii : 90, 94, and 114 inches long:__ i noticed that 90 and 94's weights are about 1 1/2 times its weight. Whereas 114's weight is about 2 times as its length.

__3 c - If you had to predict a weight for an alligator, what would it be using these lengths:__

i. 70 inches long- 62 pounds.

ii. 100 inches long- 145 pounds.

iii.130 inches long- 201 pounds.

__3 d - With what predictions you have made above, do you think that if you know the length, you would know the weight too?__

No, i don't think that you would know the weight if you know the length because everyone is different and so they all have different lengths and weights. For example, with the alligators, there are 2 alligators that have a length of 72, but ones' weight is 61 pounds, and the others' is 38 pounds.

__EXPLAINING YOUR REASONING__

__EYR #1. How does the mean and median help you to notice and describe numbers in a data set?__ The median makes you realize the middle number of your data set. And the mean makes you realize the average number in that set of data.

__EYR #2. How does the range help you to notice and describe numbers in a data set?__ The range tells you what numbers the data set is includes. So, that is useful because you can know what numbers are included in your data set.

__EYR # 3. What kinds of data would be best explained with:__

__A line plot:__ I think that it would be best to use a line plot when you have a lot of data that's range does not include a lot of data within it because i think that it will be a better and more efficient way of displaying the data.

__Stem & leaf plots:__ I think that you should use stem & leaf plots maybe when you would want to compare data because using a back to back stem and leaf plot helps you realize may or may not have in common in your two sets of data. This is also a quicker way of comparing your data.

__Coordinate Graphs:__ I think the best time to use a coordinate graph is when you have a piece of data that includes two subjects such as ' 25 gators lengths and Weights' I guess you could use a back to back stem and leaf plot but it is more efficient way of showing your data.

__EYR #4. When someone says is a persons' arm span related to her height, 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 heigh__t. __What is the person actually saying?__

I think that this person means that is the arm span/time it takes to travel to school/weight of an alligator somewhat similar or do you find any patterns between the two. For example, if ones' arm span is 12cm and their height is 48cm, that means the persons' arm span is somewhat related to his/her height because 12 x 4 = 48.