spriniyanale2i
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A building manager installs sensors to see how often people turn off the lights when they leave a room. After a month the manager has sample size of 900, a sample mean of 47%, and a sample standard deviation of 6%. What is the confidence level for a confidence interval of 46.4% to 47.6%? A. 85% B. 95% C. 68% D. 99.7%

Verified Answer :

The confidence level for a confidence interval of 46.4% to
47.6% is 99.7%.

 

In statistics, a confidence interval (CI) is
a type of interval estimate
of a population parameter.

 

The correct answer between all
the choices given is the last choice or letter D. I am hoping that this answer
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