Which term is defined as standard class width divided by current class width?

Which term is defined as standard class width divided by current class width?

• A. Normal distribution
• B. Standard deviation
• C. Present value
• D. Adjustment factor

Answer: (D)

When you have grouped data with different class widths, you need a way to put all the classes on a common scale so you can compare them or sum them accurately. You do this by scaling the frequencies (or densities) in each class by a factor that reflects how much wider or narrower that class is compared with a standard width. This scaling factor is obtained by dividing the standard class width by the current class width. That ratio is the adjustment factor. It tells you how to adjust each class to the standard width, so you can estimate what the counts would be if every class had the same width (or you can compute densities consistently across classes). The other terms—normal distribution (a theoretical shape), standard deviation (a measure of spread), and present value (a finance concept)—aren’t involved in this kind of width standardization.

When you have grouped data with different class widths, you need a way to put all the classes on a common scale so you can compare them or sum them accurately. You do this by scaling the frequencies (or densities) in each class by a factor that reflects how much wider or narrower that class is compared with a standard width. This scaling factor is obtained by dividing the standard class width by the current class width. That ratio is the adjustment factor. It tells you how to adjust each class to the standard width, so you can estimate what the counts would be if every class had the same width (or you can compute densities consistently across classes). The other terms—normal distribution (a theoretical shape), standard deviation (a measure of spread), and present value (a finance concept)—aren’t involved in this kind of width standardization.