Item CV001003: A carts and ramp experiment in which the weight of the carts is varied and the height of the ramp is held constant could tell you the effect of the weight of the cart on the cart's speed.

A student wants to know if the weight of a cart affects its speed at the bottom of a ramp.

He can change the weight of the cart by adding different numbers of balls, and he can change the height of the ramp by using different numbers of blocks.

Which set of tests should he compare (set A, B, C, or D)?

Distribution of Responses

Chart showing distrubtion of responses for Item CV001003

Percent of students responding correctly

Grades 6–843%
Grades 9–1256%
Primary Language is English50%
Primary Language is not English36%

View data table

Modifed from TIMSS item population 2 (I-12), 1994