select the correct answer. a piano teacher is...

select the correct answer. a piano teacher is interested in knowing how many of her students plan to take time off from lessons during the summer months. she surveys each student on monday and determines that about 50% of her students plan to take time off. all surveys yield the same results. she then repeats her study with her students on tuesday, wednesday, thursday, and friday. what generalization can the piano teacher make? a. about half of her students plan to take time off this summer. b. there is not enough information to generalize the survey results. c. most of her students plan to take time off this summer. d. the sample is biased, therefore, a generalization cannot be made regarding how many of her students plan to take time off this summer.

Answer

# Brief Explanations: The piano - teacher only surveys students on weekdays and finds that about 50% plan to take time off. But this sample is only from students present on those days and may not represent all her students. A sample that doesn't represent the entire population is a biased sample, and generalizations from a biased sample are not valid. # Answer: D. The sample is biased, therefore, a generalization cannot be made regarding how many of her students plan to take time off this summer.