Amala spends several hours at a local playground observing how often the children engage in cooperative as well as competitive activities. Amala's investigation can best be described as

According to your textbook, which of the following was at least partially the result of group think?

A) World War I B) the Oklahoma City bombing C) the Challenger disaster D) Fukushima Daiichi nuclear disaster

________ is a system used for reducing bias and error in the measurement of data

a) Statistics b) The scientific method c) Checks and balances d) The double-blind method