The monthly wages of a sample of $100$ employees were recorded and the numbers are rounded to the nearest ten dollars. They are arranged from $\$1,040$ to $\$1,720$.

Which of the following statements are the most appropriate in constructing a frequency distribution for this set of data?

i.the number of classes should be 7.ii.the class interval should be \$100.iii.the number of classes should be 6.iv.the class interval should be \$90.

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