Midterm Exam Results reported as z-scores.The professor for one ...

[09madisonrousseau09]

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

[rachel]

Answer to Question 1

Z = (82  75)/5 = 1.4

Answer to Question 2

B

[09madisonrousseau09]

Thanks for the timely response, appreciate it

[Chelseyj.hasty]

Gracias!