Mathematics, 13.02.2021 08:00 rydro6915
19. The mean age (at inauguration) of all U. S. Presidents is approximately Normally
distributed with a mean of 54.6. Barack Obama was 47 when he was
inaugurated, and his z-score was -1.21. What is the standard deviation of
presidents' ages?
(a) -9.20
(b) -6.28
(c) 6.28
(d) 7.60
(e) 9.20
What is the standard deviation of the presidents age?
Answers: 2
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19. The mean age (at inauguration) of all U. S. Presidents is approximately Normally
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