How can we find class intervals
How ca n we make an ogive
Plz ans it fast
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Answer:
Upper limit - lower limit= Class interval
How to plot a More than type Ogive:
In the graph, put the lower limit on the x-axis
Mark the cumulative frequency on the y-axis.
Plot the points (x,y) using lower limits (x) and their corresponding Cumulative frequency (y)
Join the points by a smooth freehand curve. It looks like an upside down S.
How to plot a Less than type Ogive:
In the graph, put the upper limit on the x-axis
Mark the cumulative frequency on the y-axis.
Plot the points (x,y) using upper limits (x) and their corresponding Cumulative frequency (y)
Join the points by a smooth freehand curve. It looks like an elongated S.
Hope it helps u.
shraddha33204:
i wrote what i knew it is given by teacher
now if she had written from some where than i don't know
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good morning
here is your answer
How can we fine class interval?
Calculate the class interval using the following formula: Class interval = range ÷ number of classes. If you have 15 classes of income in the distribution of income example, work out 30 ÷ 15 = $2 billion. Often, statisticians ignore extremely high and low figures and focus on the midrange frequencies. For this reason, income distribution in the U.S. is presented in smaller intervals of $10,000 with incomes greater than a certain figure, usually a million, lumped together in a single class interval.
How can we make an Ogive?
How to Draw an Ogive Graph
Example question: Draw an Ogive graph for the following set of data:
02, 07, 16, 21, 31, 03, 08, 17, 21, 55
03, 13, 18, 22, 55, 04, 14, 19, 25, 57
06, 15, 20, 29, 58.
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):

If you aren’t sure how to create your class limits(also called bins), watch the video at the bottom of this article or see: What is a Bin in Statistics?
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.
The finished graph for this sample data:
good morning
here is your answer
How can we fine class interval?
Calculate the class interval using the following formula: Class interval = range ÷ number of classes. If you have 15 classes of income in the distribution of income example, work out 30 ÷ 15 = $2 billion. Often, statisticians ignore extremely high and low figures and focus on the midrange frequencies. For this reason, income distribution in the U.S. is presented in smaller intervals of $10,000 with incomes greater than a certain figure, usually a million, lumped together in a single class interval.
How can we make an Ogive?
How to Draw an Ogive Graph
Example question: Draw an Ogive graph for the following set of data:
02, 07, 16, 21, 31, 03, 08, 17, 21, 55
03, 13, 18, 22, 55, 04, 14, 19, 25, 57
06, 15, 20, 29, 58.
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):

If you aren’t sure how to create your class limits(also called bins), watch the video at the bottom of this article or see: What is a Bin in Statistics?
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.
The finished graph for this sample data:
Attachments:
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