FREQUENCY DISTRIBUTION TABLE and FREQUENCY DISTRIBUTION GRAPH Step i to find min and max, and compute range Step 2 set up class intervals Step 3 set all the data in one of the class intervals Department of Health Statistics
FREQUENCY DISTRIBUTION TABLE and FREQUENCY DISTRIBUTION GRAPH Step 1 to find MIN and MAX, and compute range Step 2 set up class intervals Step 3 set all the data in one of the class intervals Department of Health Statistics
Step 1 M|N4.35 MAX 7.86 Range 3.5 Range is the difference between max and min Department of Health Statistics
MIN 4.35 MAX 7.86 RANGE 3.51 Range is the difference between MAX and MIN Department of Health Statistics Step 1
Step 2 e Divide the range by the approximate number of class intervals Generally we will wish to have 7 to 15 class intervals, which is related with sample size. The larger sample size is the more class intervals there are accordingly Department of Health Statistics
Divide the range by the approximate number of class intervals. Generally we will wish to have 7 to 15 class intervals, which is related with sample size. The larger sample size is, the more class intervals there are accordingly. Department of Health Statistics Step 2
Step 2 Suppose we wish to have 7 class intervals, then the interval width is 3.5|( range)7≈0.5 So we choose 0.5 as the interval width Department of Health Statistics
Suppose we wish to have 7 class intervals, then the interval width is 3.51(range)/7 ≈ 0.5 So we choose 0.5 as the interval width . Department of Health Statistics Step 2
Step 2 e Divide the range by the desired number of subintervals o Your attention The first subinterval must contain MIN. and the last one must include max Department of Health Statistics
Divide the range by the desired number of subintervals. Department of Health Statistics Step 2 Your attention: The first subinterval must contain MIN, and the last one must include MAX