Question

mrs. buckley, the principal at somerville middle school, asked her teachers to participate in a study on teaching methods. the 7 teachers who volunteered took part in a day - long study. is this sample of the teachers in the school likely to be biased? yes no

Explanation:

A biased sample occurs when the sample is not representative of the entire population. Here, the sample consists of only volunteers (7 teachers) for a day - long study. Teachers who volunteered may have different characteristics (e.g., more interested in teaching methods, more available) than the entire teacher population. So this sample is likely to be biased.

Answer:

yes