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Author Question: Midterm Exam Results reported as z-scores.The professor for one section of a multi-section math ... (Read 151 times)

09madisonrousseau09

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on: Jul 24, 2018
Midterm Exam Results reported as z-scores.The professor for one section of a multi-section math course will be reporting his students' midterm exam scores as z-scores. Jackson's score on the midterm exam was 82 points. The section's class mean was 75 and the standard deviation was 5 points. What was his z-score?

Question 2

A randomly selected sample of n = 51 men in Brazil had an average lifespan of 59 years. The standard deviation was 10 years, and the standard error of the mean is 1.400 . Calculate a 90 confidence interval for the average lifespan for all men in Brazil.
 a. (42.2, 75.8)
  b. (56.6, 61.4)
  c. (56.2, 61.8)
  d. None of the above


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rachel

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Reply #1 on: Jul 24, 2018
Answer to Question 1

Z = (82  75)/5 = 1.4

Answer to Question 2

B


09madisonrousseau09

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Reply 2 on: Jul 24, 2018
Great answer, keep it coming :)

isabelt_18

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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