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Elementary,Middle School,High School,College,University,PHD
| Teaching Since: | May 2017 |
| Last Sign in: | 408 Weeks Ago |
| Questions Answered: | 66690 |
| Tutorials Posted: | 66688 |
MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
An ethologist is interested in how long it takes a certain species of water shrew to catch its prey. On 20 occasions each day, he lets a dragonfly loose inside the cage of a shrew and times how long it takes until the shrew catches the dragon- fly. After months of research, the ethologist concludes that the mean prey-catching time was 30 seconds, the standard deviation was 5.5 seconds, and the scores were normally distributed. Based on the shrew’s past record, what is the probability
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a. It will catch a dragonfly in less than 18 seconds?
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b. It will catch a dragonfly in between 22 and 45 seconds?
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c. It will take longer than 40 seconds to catch a dragonfly? biological
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