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Home Q & A Board Science-Related Homework Help Mathematics Statistics and Probability
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stroman54 stroman54
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6 years ago
Your statistics instructor wants you to determine a confidence interval estimate for the mean test score for the next exam. In the past, the test scores have been normally distributed with a mean of 74.2 and a standard deviation of 30.9 . A 95 confidence interval estimate if your class has 30 students is:
 a. 68.72 to 79.68.
  b. 13.64 to 134.76.
  c. 64.92 to 83.48.
  d. 62.66 to 85.73.
  e. 63.14 to 85.26.
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ruffruff
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stroman54 Author
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6 years ago
Brilliant ツ
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