Mrs. Smith's music class has 11 students. (a) Mrs. Smith wants three of the students in the class to form a trio and play a song for the rest of the class. If any of the students can be selected, how many different trios are possible? (b) Later, Mrs. Smith needs four of the students in the class to form a quartet to work on an upcoming performance. If any of the students can be selected, how many different quartets are possible?

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Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.