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NERD NERD
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Posts: 805
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6 years ago
Thirty randomly selected students took the calculus final. If the sample mean was 92 and the standard deviation was 9.4, construct a 99 percent confidence interval for the mean score of all students.
 
  A) 87.29 <  < 96.71 B) 87.77 <  < 96.23 C) 89.08 <  < 94.92 D) 87.27 <  < 96.73
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