anonymous
  • anonymous
building manager installs sensors to see how often people turn of the lights when they leave a room. After a month the manager has sample size of 625, a sample mean of 47%, and a sample standard deviation of 5%. What is the confidence level for a confidence interval of 46.8% to 47.2%?
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
A. 85% B. 95% C. 68% D. 99.7%
anonymous
  • anonymous
never mind its 68%
anonymous
  • anonymous
Correct it is 68%!

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anonymous
  • anonymous
Do you know how you did it?

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