QUESTION

• The following are the weights (in lbs) of grade 7 students. Construct a frequency table using 7 as desired number of class interval. How mang students weight more than 100 lbs?

SOLUTION

1. Lets determine the range

2. Desired Number of Class interverval = 7

3. Determine the Class Width

4. Write the class intervals starting with the lowesr lower value as determined in the data.

• Lets start with 80 and with w = 6, the class intervals are: 80 - 86, 87 - 93, 94 - 100, 101 -107, 108 - 114, 115 _ 121

5. Tally the corresponding number of scores in each interval. Then summarize the results or sum up the tallies under the frequency column.

ANSWER

• The students who weigh more than 100 lbs are those in the class inversal 101 - 107, 108 - 114, and 115 - 121. Therefore, there are 9 + 5 + 1 = 15 students who weigh more than 100 lbs