A production division received 45 responses to a customer-service survey distributed to 100 purchasing departments randomly selected from all customers who made purchases in the prior 12 months. Which of the following is the most likely reason that the division manager would be concerned about nonresponse bias in this situation?
A. The sample means and standard errors are more difficult to compute.
B. Those who did not respond may be systematically different from those who did.
C. The sample size is too small.
D. Confidence intervals are narrower.
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