Anonymous
Anonymous asked in Science & MathematicsMathematics · 8 years ago

Which intervals can you use to make a frequency table for the data set?

95 103 110 86 72 77 97 118 83 101 105 79 78 95 93

Relevance
• 7 years ago

It depends on how many intervals you want.I would use 5 here because it's a small data set and 5 is about the fewest number of intervals that will give you any insight into the distribution.

So first get the range: 105 - 72 = 33

Now divide by 5, and you get 6.6. Round UP to get your class width. ALWAYS round up. If you round down, you will not have enough space for your last number.

Start the lowest lower class boundary at the minimum, then increase by the class width to the next lower class boundary, until you have 5 lower class boundaries.

THEN put in the upper class boundaries: Each is 1 less than the next lower class boundary, and the last is one class width above the prvious upper class boundary: Watch carefully:

LCB

72

79

86

93

100

UCB

78

85

92

99

106

This is a very good fit.Now just fill in with your frequencies.