Question

About 12% of children are nearsighted. A school district will be testing the vision of 170

incoming kindergarten children.
What proportion of these kids should we expect to be nearsighted (p-hat)?

Answer 1

about 21 kids out of 170 are expected to be nearsighted (20:170)

Explanation:

we find 12% out of 70 by muliplying 170 x 0.12 which equals 20.4

However it has to round up because we cant have half a child so 21 children.