For each of the situations below, describe what would be considered a Type I and Type II error.

a. A consumer group wants to see if people can tell whether they are drinking tap water or bottled water.

b. A college instructor wishes to see whether his students prefer to work on assignments individually or in groups.

c. A teacher evaluating a program designed to improve math skills gives her students a test before and after the program.

d. A college student conducts searches on two different Internet search engines to see if they differ in terms of the number of relevant results provided.