Z scores and percentiles

[shawnsunicorn]

A population of ducks quacked an average of 30 times per minute with a standard deviation of 5. A mallard duck (duck 218) quacked 24 times. Determine the percentage of ducks that quacked more often than duck 218?

 

[Dr.Peterson]

Please show us what you know about using z-scores to find the probability that the number of quacks per minute is greater than 24. We need to see where you need help, in order to provide that help.

I assume duck 218 quacked its 24 times in one minute.