Author: Study Clue

Data: 2, 4, 6, 8, 10; the sample variance is A 8 B 6 C 10 D 5 Explanation Mean

For values 6, 7, 9, 10, 13 the mean deviation about mean is A 2.0 B 2.2 C 2.4 D

A data set has 9 values; the median position is A 4th value B 6th value C 9th value D

A “variable” in statistics is A Fixed constant always B Only a formula C Characteristic that changes D Only a

In statistics, a “population” means A Small chosen group B Random guess list C Entire group studied D Only numeric

For equally spaced x with step h, if Δ³y is constant and nonzero, the simplest matching function type is A

For equally spaced x, if a dataset comes from a quadratic function, which differences are constant? A First differences B

For equally spaced x with step h, the forward difference at xᵢ is A yᵢ − yᵢ₋₁ B yᵢ₊₁ −

If a table has constant third differences (equally spaced x), the data best fits a A Quadratic polynomial B Cubic

In a forward difference table, which operator represents the first forward difference? A Δ operator B ∇ operator C δ