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All the values in a data set are whole numbers and the smallest is two. What is the convenient starting point for the first histogram interval?
AA starting point of 2.0
BA starting point of 2.5
CA starting point of 1.0
DA starting point of 1.5
Answer & Solution
Correct answer: D. A starting point of 1.5
1. The starting point is chosen below the smallest value and with one more decimal place than the data.
2. Whole number data carry no decimals, so half a unit is subtracted from the smallest value.
3. Two minus 0.5 gives 1.5, which is the convenient starting point.
4. Starting at 2.0 would place a data value exactly on a boundary, which is what the adjustment is designed to prevent.
_Source: OpenStax Introductory Business Statistics (CC BY 4.0), Ch 2 "Descriptive Statistics", section 2.1 Display Data_
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