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Gregor Mcalpine Assignment Date: Nov.8 2010 Due Date Dec.6 2010 Making Graphs with Technology: Data About Us

1.Consider the length of the Alligators 1.A: Make a graph of the lengths of the 25 Alligator then write a sentence describing the lengths on the graph. Sentence: The average of the lengths of the alligators is between 80inches and 90 inches, the mean is 84.96 and the median is 85 and the range is 58 - 147. 1.B: Mean: 84.96 Median: 85 1.C: Range: 58 inches - 147 inches

2: Consider the weight of the Alligators. 2.A: make a graph showing the data of the Alligators Weights. 2.B: What is the median and mean of the weights. 2.C: What is the range of the weights. Answers: 2.A: 2.B:Mean:108.2 pounds, Median 80 pounds 2.C: the range is 28 pounds to 640 pounds

3: Explore the difference between the length and weight of the alligators. 3.A: Make a coordinate graph of the ( length and weight) of the alligators data. 3.B:What difference relationship do you see between the length and weight of the alligators that are... i: 61 and 63 inches long? ii: 82,85 and 86 inches long? iii: 90, 94 and114 inches long? 3.C:What weight would you predict an alligator that is... i: ii: iii: 3.D: Based on your study of the alligator length and weight data, do you believe it is possible to make a good guess for the weight of an alligator if you know the length of the alligators. Answers: 3.A: 3.B: i: The Weight for the alligators who's length is 61 is 44 pounds and the alligator who's length is weights 33 pounds. ii: All of the weights are in the 80's. iii: All of the weights are in the 100's.

3.C: i:I think that the alligator will weight around 30 - 40 pounds. ii: I think that the alligator will weight around 170 - 200 pounds. iii: I think that the alligator will weight around 366 - 640 pounds.

3.D: No, you can't make an accurate estimation because the alligators can me 100 inches long and yet they can be only 30 pounds or they could be 30 inches long and 100 pounds. If something is around a certain length that doesn't mean that the weight will be around the length number.

Explaining your Reasoning- When you describe a collection of data,you look for the shape of the distribution of the data. You often visualize data patterns using graphs. 1: How does the //mean// and the //median// help in describing the numbers in a data set? 2: How does the //range// help in describing the numbers in a data set? 3: What kinds of numerical data are best displayed with 3.A: Line plots? 3.B: Stem-and-leaf plots? 3.C: Coordinate graphs? Answers: 1: The mean helps you know what the average is of the data set. The median lets you know what the middle of the data set is. 2: The range helps you know what the smallest data value is and what the highest data value is. 3.A: Data that compares one factor about a group. 3.B: Data that only has 2 digit number and above. 3.C: Data that compares two different factors for two different data sets.

4: What does it mean to say that a person's arm span is related to his or hers 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 length Answers: The two factors have have a connection.