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ml-recall

#sample-variance

1 question from Statistics & Estimation

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Question 1: Short answer

hardAI-checkedStatistics & Estimation

In a class of 25, 24 students took an exam and scored a mean of 74 with a standard deviation of 8.9 (the sample SD, dividing by n−1n - 1). The last student takes a make-up exam and scores 64. What is the standard deviation of all 25 scores, again dividing by n−1n - 1?

2 decimals