Decide Class Intervals: Now, let's decide on the class intervals for the frequency distribution table. Since the lowest score is 35 and the highest is 95, we can use intervals of 10, starting from 30 up to 100.
Count Scores in Intervals: Let's count the number of scores that fall into each interval. We'll start with the interval 30−39 and move up to 90−99.
Counting 30−39: Counting for the interval 30−39:There are 2 scores (35,37) in this interval.
Counting 40−49: Counting for the interval 40−49: There are 4 scores (40, 44, 45, 49) in this interval.
Counting 50−59: Counting for the interval 50−59: There are 5 scores (50, 53, 53, 55, 55, 58, 59) in this interval.