Scatter Plots Frequency Tables Histograms Line Plots Box and Whisker

Scatter Plot A scatter plot is a graph of a collection of ordered pairs (x,y). The graph looks like a bunch of dots, but some of the graphs are a general shape or move in a general direction.

Positive Correlation, Negative Correlation or No Correlation

What is a Frequency Table? A Frequency table is a table that lists each item in a data set with the number of times it occurs.

Construct a Frequency Table (tally sheet) 7, 10, 10, 9, 8, 9, 7, 4, 3, 7, 10, 4, 8, 9, 6, 7, 10 Enter the data value into the 1st column Data Value Tally Frequency 1 2 3 4 5 6 7 8 9 10

Construct a Frequency Table (tally sheet) Count the tallies and put the total for each value in the frequency column Data Value Tally Frequency 1 2 3 4 5 6 7 8 9 10 1 2 1 4 2 3 4

Making a Line plot x x x x x x x x x x x x x x x x x 3 4 5 6 7 8 9 10 What is the range? 7 3 4 5 6 7 8 9 10

What is a Histogram? A histogram is a bar graph with no spaces between the bars. The height of each bar shows the frequency of data within that interval. The intervals of a histogram are of equal size and do not overlap.

Histogram Class Test Scores Frequency Test Scores

Histograms 95 flashlights are tested until they fail. The table gives the times taken ( hours ) until failure. Time to failure (hours) 0-19 20-29 30-39 40-44 45-49 50-59 60-89 Number of components 5 8 16 22 18 10 Find 2 or more things wrong with the histogram which represents the data in the table.

Histograms Answer: Time to failure (hours) 0-19 20-29 30-39 40-44 45-49 50-59 60-89 Number of components 5 8 16 22 18 10 Time taken for 95 components to fail There is no title. There are no units on the x-axis. Time to failure (Hours)

Histogram Histograms are used to show the frequency of data. Very similar to bar graphs, but use intervals on the X axis. Bars do touch. Histograms have a title. Histograms have two axes which are labeled.

    Press 2nd STATPLOT and choose #1 PLOT 1.   You should see       the screen at the right.  Be sure the plot is ON, the second        box-and-whisker icon is highlighted, and that the list you will be       using is indicated next to Xlist.    Freq: 1 means that each        piece of data will be counted one time.    Seeing the graph:       To see the box-and-whisker plot, press ZOOM and #9 ZoomStat.   Press the TRACE key to see on-screen data about the box-and-whisker plot.  Enter the data into the calculator lists.          Choose STAT, #1 EDIT and type in entries.

https://www.youtube.com/watch?v=3KjMSSsRzKY