Use the Following to Answer Questions

question 5

Short Answer

Use the following to answer questions :
The following table gives the cumulative frequency distribution of annual incomes (in thousands of dollars)for a sample of 200 families selected from a city.

-The percentage of families with an income of less than $55,000,rounded to one decimal place,is:

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Definitions:

Gene Pool

Total of the alleles of all the individuals in a population.

Permian

The last geological period of the Paleozoic era, spanning from about 299 to 252 million years ago, preceding the Mesozoic era.

Mesozoic Layers

Stratified layers of rock that were formed during the Mesozoic Era, which spans from about 252 to 66 million years ago, encompassing the Triassic, Jurassic, and Cretaceous periods.

Dinosaur Fossils

Remains or traces of dinosaurs preserved in rock.