Mathematics · Measures of Dispersion
Two data sets of sizes 9 and 6 have standard deviations of 3 and 4 respectively, and both have an arithmetic mean of 3. The standard deviation of the combined data set of size 15 is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1√(17515)
- 2√(17815)
- 3√(17615)
- 4√(17715)✓
Correct answer
√(17715)
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