Question

construct the ogive cure​

Answer 1

Step 1: Make a relative frequency table from the data. The first column has the class limits, the second column has the frequency (the count) and the third column has the relative frequency (class frequency / total number of items):

Step 2: Add a fourth column and cumulate (add up) the frequencies in column 2, going down from top to bottom. For example, the second entry is the sum of the first row and the second row in the frequency column (5 + 5 = 10), and the third entry is the sum of the first, second, and third rows in the frequency column (5 + 5 + 6 = 16):

Step 3: Add a fifth column and cumulate the relative frequencies from column 3. If you do this step correctly, your values should add up to 100% (or 1 as a decimal):

Step 4: Draw an x-y graph with percent cumulative relative frequency on the y-axis (from 0 to 100%, or as a decimal, 0 to 1). Mark the x-axis with the class boundaries.

Step 5: Plot your points. Note: Each point should be plotted on the upper limit of the class boundary. For example, if your first class boundary is 0 to 10, the point should be plotted at 10.

Step 6: Connect the dots with straight lines. the ogive is one continuous line, made up of several smaller lines that connect pairs of dots, moving from left to right