FREQUENCY DISTRIBUTION GRADE 10

HOBBIESGrade 10 Students TALLY Dancing Singing Basketball Reading

Frequency – is how often something occurs. Ex. Sam played football on Every Saturday morning Every Saturday afternoon Every Thursday afternoon

E.g. The following are heights in centimeters of 35 students.

Step 1. Find the range. Range = Largest quantity – Smallest quantity

Step 2. Determine the approximate number of classes using the sturges’formula: k = log N Where k = approximate number of classes Log N = logarithm of the total number of observations or raw data Round off the value of k to the nearest integer.

Step 4. Determine the classes starting with the lowest class.

Step 4. Use the smallest quantity for the lowest limit of the first class.

E.g. The following are heights in centimeters of 35 students.

Step 4. If the data are whole numbers, subtract 1 from the interval i, then add the difference to the lower limit to obtain the upper limit of the first class.

Step 4. If the data are decimal numbers, subtract 0.1 from the class interval size, if these data are written to the nearest tenth.

Step 4. If they are written to the nearest hundredths subtract Add the interval i to the lower limit and the upper limit of the class

Step 4. obtain the lower limit and upper limit of the next class. Follow this procedure until a class that contains the largest quantity is obtained.

Step 5. Tally the quantities

Step 6.Determine the frequency f for each class by counting the tally.

1. The following are the weight in kilograms of 56 students

E.g. The following are heights in centimeters of 35 students.