Chapter 12, Problem 6PT4

To determine

Find: one of the above survey strategies to measure the proportion of all people in a medium-sized community who are in favour of tax increases to benefit the local school system doesn’t suffer from under coverage bias.

Answer to Problem 6PT4

This list has all the adults, while there may be adults who do not favour the tax increase, this is not an under-coverage bias.

Explanation of Solution

a) Local telephone book isn't complete. Local law officers, for example, and those that-opt out of the phone book are not included, and these may be attributed to those that support tax hikes and generate a bias.

b) Not all adults have kids attending local schools, which would be undeclared

c) Not all adults use enquiries online.

d) Not all adults’ own house

e) This article includes all adults while there may be adults who are not in favour of tax increases, this is not a coverage bias.

Under coverage bias is the sampling where the sample is not representing the whole population. In a medium-sized city the population is all people who support a tax increase.

Hence, the correct option is (e)