A government study is undertaken with the aim of determining the benefits of a new driver training scheme and whether it has a different outcome on over-25 years old learner drivers than for under-25 years old learner drivers. The training program is undertaken for a group of 80 learner drivers, half of which are under 25 years old, half are over 25 years old. Then within each group of 40, half are randomly selected to participate in the new training program. The results are recorded and compared. This scenario is best described as an example of:

Paint color preference children adults total 0.6 0.77 liked new paint color disliked new paint color 0.4 0.15 0.23 total 1.0 1.0 1.0 which value for x completes the conditional relative frequency table by column?

Asmall (but heavy) particle placed in a glass of water will follow a zigzag motion because the particle will bounce off of the water molecules it meets. this is called brownian motion. a physicist simulates this on a computer, by varying the distance a particle can travel (called the mean free length), on average, before it collides with a water molecule and assigning the change in motion to be one of 8 directions, each with a similar probability. by running the simulated particle (with the same mean free length) many times she determines that it should take 15 seconds, on average, for the particle to fall to the bottom, with a standard deviation of 1.5 seconds. next she lets a real particle fall through a glass of water and finds that it took 18 seconds. what does she conclude, and why?

What is the value of x in the following equation. -x ^3/2 = -27