anonymous
  • anonymous
**MEDAL/FAN A study of five hundred adults found that the number of hours they spend on social networking sites each week is normally distributed with a mean of 14 hours. The population standard deviation is 3 hours. What is the margin of error for a 95% confidence interval? 0.134 0.220 0.263 0.313
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
@ganeshie8 @pooja195 @Michele_Laino
Michele_Laino
  • Michele_Laino
Hint: 95% confidence interval, means that our variable has to be within an interval whose ends are: \[\Large \begin{gathered} 14 - 1.96\sigma = 14 - 1.96 \times 3 = ...? \hfill \\ 14 + 1.96\sigma = 14 + 1.96 \times 3 = ...? \hfill \\ \end{gathered} \]
anonymous
  • anonymous
So its 8.12 and 19.88

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anonymous
  • anonymous
@Michele_Laino is that right? Can you help me pls thats not an option

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