Eruptions of the Old Faithful geyser have duration times with a mean of 245.0 sec and a

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Eruptions of the Old Faithful geyser have duration times with a mean of 245.0 sec and a standard deviation of 36.4 sec (based on Data Set 15 in Appendix B). One eruption had a duration time of 110 sec.

a. What is the difference between a duration time of 110 sec and the mean?

b. How many standard deviations is that (the difference found in part (a))?

c. Convert the duration time of 110 sec to a z score.

d. If we consider “usual” duration times to be those that convert to z scores between -2 and 2, is a duration time of 110 sec usual or unusual?

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Elementary Statistics

ISBN: 9780321500243

11th Edition

Authors: Mario F. Triola

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Question Posted: Feb 21, 2020 12:36 PM

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Eruptions of the Old Faithful geyser have duration times with a mean of 245.0 sec and a

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Elementary Statistics

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