Based on the information given about the research, the most appropriate method of estimation will be a one-sample z-interval for a population proportion.
From the information, it was stated that biologists studying horseshoe crabs want to estimate the percent of crabs in a certain area that are longer than 35 centimeters.
In this case, the most appropriate method to use for such an estimate is one-sample z-interval for a population proportion. This is appropriate because it can be used to know whether the new of the population is greater or less than a specific value.
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