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Question 13

It is known that the average time an adult can read a 1000-word passage is 4.5 minutes. A psychologist is interested in whether exercising eye muscles would make this process faster. 25 adults voluntarily participate in the research, and they do eye exercises for 5 minutes every day for 2 weeks. After the training session, they come to the researcher's lab and read a 1000-word passage while being timed. The dataset is provided in the Excel file.

Based on the information above, what is the sample standard deviation?

  • A. 0.73324
  • B. 0.64224
  • C. 11.2384
  • D. 1.77928
  • E. 1.711