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MMLU / A college admissions officer is interested in comparing the SAT math scores of…

Problem

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question

A college admissions officer is interested in comparing the SAT math scores of high school applicants who have and have not taken AP Statistics. She randomly pulls the files of five applicants who took AP Statistics and five applicants who did not, and proceeds to run a t-test to compare the mean SAT math scores of the two groups. Which of the following is a necessary assumption?

choices

  1. The population variances from each group are known.
  2. The population variances from each group are unknown.
  3. The population variances from the two groups are equal.
  4. The population of SAT scores from each group is normally distributed.

subject

high_school_statistics

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