Mathematics, 04.12.2019 06:31, loveniasummer71
Abuilding manager installs sensors to see how often people turn off the lights when they leave a room. after a month, the manager has a sample size of 400, a sample mean of 47%, and a sample standard deviation of 4%. what is the confidence level for a confidence interval of 46.6% to 47.4%?
a. 68%
b. 85%
c. 99.7%
d. 95%
Answers: 3
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