Question

A retail analyst emails a satisfaction survey to 10,000 customers, but only the 1,200 customers who had a recent complaint respond. The results show unusually low satisfaction scores, and leadership wants to use them to overhaul the entire product line. What is the analyst's most important concern when assessing the validity of these results?

Accepted Answer

Nonresponse bias, because the respondents are not representative of the full customer base

Answer

The sample size of 1,200 is too small to draw any statistical conclusions

Answer

The confidence interval should be widened to account for the large population

Answer

A Type I error occurred because the null hypothesis was incorrectly rejected