Question

Please Help!!!

Which scenarios describe data collected in a biased way? Select all that apply.

A principal interviewed the 25 students who scored highest on a reading test.

Without looking, Trey picked 10 numbers from a bag containing 100 raffle tickets.

Kiara put the names of all the students in her school into a hat. Then she drew 5 names.

For a report on the exercise habits of adults, Sergio talked to 30 adults at a local fitness center.

Josh asked the first 25 people he met at the dog park if they preferred dogs or cats.

Answer 1

A, D, and E

Explanation:

Answer 2

A. principal interviewed the 25 students who scored highest on a reading test.

D. For a report on the exercise habits of adults, Sergio talked to 30 adults at a local fitness center.

E. Josh asked the first 25 people he met at the dog park if they preferred dogs or cats.

Explanation:

Biased means if the selection of every unit does not have an equal chance of being selected in a sample.

The sample is said to be good if choosing the unit is unbiased. The sample is said to be unbiased if the selection of each unit is independent.

Option A is an example of data selected in a biased way because principal chose only those student who scored the highest marks on reading test.

Options B and C are unbiased as here a selection of each number and name of the student has an equal chance of being selected.

Option D is biased because Sergio talked adults at a local fitness center where people go for maintaining their health. So, there is a chance of the selection of fitted adults more than unfitted adults.

Option E is biased because Josh met people at the dog park where dog lovers are more than a cat lover.