Analyzing Data PDF

Warm-Up ? Analyzing Data Lesson Question Lesson Goals Analyze data to determine Examine charts and graphs to predict trends in the data. W 2K and Apply the concepts of mean, median, and mode to a data set.. Use data to draw inferences and formulate conclusions. Words to Know Fill in this table as yo...

Warm-Up ? Analyzing Data Lesson Question Lesson Goals Analyze data to determine Examine charts and graphs to predict trends in the data. W 2K and Apply the concepts of mean, median, and mode to a data set.. Use data to draw inferences and formulate conclusions. Words to Know Fill in this table as you work through the lesson. You may also use the glossary to help you. a type of numerical data that can be measured to examine in detail a type of non-numerical, descriptive data forming a straight line not forming a straight line the number that occurs most often in a set of data points a visual representation of data the average of a list of numbers the middle value in an ordered list of numbers © Edgenuity, Inc. 1 Warm-Up Analyzing Data Experimental Design Principles Different scientific designs follow a similar method. Good design and repeatability ensure valid results. reduces mistakes and increases confidence in the results. should produce the same results. Data must be reliable and consistent. is the closeness of measured values to the accepted value. is the closeness of measured values to other measured values. © Edgenuity, Inc. is the ability of data to be duplicated. 2 Instruction Analyzing Data Slide 2 Valid vs. Invalid Data Valid data can be and by the researcher and other scientists. Invalid data may result from: data. false data. the 4 or recording errors. to reproduce data. Types of Data Qualitative data are Can be , descriptive data. but not measured Quantitative data are © Edgenuity, Inc. data that can be 3. Instruction Analyzing Data Slide 4 Data Analysis data can be in different ways. Example: 2.5 1 22 250% 7 data. Analyze data. Draw Organize data. Types of Graphs A graph is a representation of data. Communicates complicated facts Presents in a way that is easy to understand Displays data in a variety of ways © Edgenuity, Inc. 4. Instruction Analyzing Data Slide 7 Line Graphs Deer Population over Time Line graphs often show over a period of. The x-axis displays time period. The y-axis shows what is being measured. Number of Deer 50 40 30 20 10 0 0 1 or Line graphs may be 2 3 4 Time (years). 9 can be made from the data. Bar Graphs Bar graphs particular quantities for Circle the average height of a sunflower after three weeks.. Average Plant Height after Three Weeks 14.0 Used to see quickly Average Height (cm) 12.0 10.0 8.0 6.0 4.0 2.0 0.0 Grass Sunflower Plants © Edgenuity, Inc. 5 Birch Tree 5 Instruction Analyzing Data Slide 9 Pie Graphs Pie graphs show the relationship among parts of a. Circle the second most abundant element in the Earth’s crust. 12 Scatterplots Scatterplots show the relationship between two Draw an arrow to show the relationship between study time and quiz grade. © Edgenuity, Inc. 6. Instruction Analyzing Data Slide 12 Histograms A histogram represents the of data. numbers into Frequency Distributions Frequency distributions group data into particular value occurs. Age Frequency 10–14 4 15–19 20–24 8 25–29 30–34 6 35–39 © Edgenuity, Inc. 7 and show how often a Instruction Analyzing Data Slide 15 Mean Mean is the Mean = of a list of numbers. of all the data points Total number of data points EXAMPLE A scientist wants to know how well some bacteria grow on plates. He uses the same bacteria on five separate plates, and counts the number of colonies. His results are shown in the table. © Edgenuity, Inc. Plate Number of colonies 1 2 2 4 3 3 4 1 5 0 What is the mean number of bacterial colonies on the plates? 2+4+3+1+0 5 10 = 5 Mean = = 8 Instruction Analyzing Data Slide 17 Median Median is the value in an list of numbers. If the number of data points is , it is the point directly in the middle. If the number of data points is , it is the average of the two middle numbers. 4+5 2 9 = 2 Median = = Mode Mode is the number that occurs points. often in a Example: 1,1,1, 2, 4, 4, 4, 4, 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7, 8, 8, 8, 9 © Edgenuity, Inc. 9 of data Summary ? Lesson Question Analyzing Data How are data analyzed? Answer Slide 2 Review: Key Concepts Valid data can be verified and reproduced by the scientists. data, false data, measurement Invalid data may result from or recording errors, or the inability to reproduce data. © Edgenuity, Inc. and other 10 Summary Analyzing Data Slide 2 Review: Key Concepts are visual representations that display data in a variety of ways. Line graphs show changes over time. Bar graphs compare quantities for particular categories. Pie graphs show the relationship among parts of a whole. Scatterplots show the relationship between two variables. Histograms represent the distribution of data. group data into categories and show how often a particular value occurs. Review: Key Concepts can help scientists understand trends. Mean is the average of a list of numbers. Median is the middle value in an ordered list of numbers. Mode is the number that occurs most often in a set of data points. © Edgenuity, Inc. 11 Summary Analyzing Data Use this space to write any questions or thoughts about this lesson. © Edgenuity, Inc. 12