3 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.
4 Construct a Frequency Table (tally sheet) 7, 10, 10, 9, 8, 9, 7, 4, 3, 7, 10, 4, 8, 9, 6, 7, 10Enter the data value into the 1st columnData ValueTallyFrequency12345678910
5 Construct a Frequency Table (tally sheet) 7, 10, 10, 9, 8, 9, 7, 4, 3, 7, 10, 4, 8, 9, 6, 7, 10Enter a tally for each entry.Data ValueTallyFrequency12345678910
6 Construct a Frequency Table (tally sheet) Count the tallies and put the total for each value in the frequency columnData ValueTallyFrequency123456789101214234
7 Construct a Frequency Table (tally sheet) We can find the percent in each row by dividing by the total.Count the tallies and put the total for each value in the frequency columnData ValueTallyFrequencyPercent1234567891016%1/17=0.058212%2/17=0.11716%1/17=0.058424%4/17=0.235212%2/17=0.117318%3/17=0.176424%4/17=0.23517
8 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
9 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.
11 Histograms95 flashlights are tested until they fail. The table gives the times taken ( hours ) until failure.Time to failure (hours)0-1920-2930-3940-4445-4950-5960-89Number of components5816221810Find 2 or more things wrong with the histogram which represents the data in the table.
12 HistogramsAnswer:Time to failure (hours)0-1920-2930-3940-4445-4950-5960-89Number of components5816221810Time taken for 95 components to failThere is no title.There are no units on the x-axis.Time to failure (Hours)
13 Line Plot Favorite Colors X X X X X X X X X X X X X Red Blue Green Yellow Purple
14 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.