A sample produced a list of 5024 licensed drivers. The investigators then chose an SRS of 880 of these drivers to answer questions about their driving habits.

(a) How would you assign labels to the 5024 drivers?

Assign labels 0 through 5023.

Assign labels 1 through 5024.

Assign labels 0000 through 5024.

Assign labels 0001 through 5024.

Use Table B, starting at line 119, to choose the first 5 drivers in the sample. Please put the correct number to :

Label of first driver selected

Label of second driver selected

Label of third driver selected

Label of fourth driver selected

Label of fifth driver selected

Answer Bank

0711

4216

3547

6649

4826

1887

2099

6669

0325

9585

5880

7319

(b) One question asked was, "Recalling the last ten traffic lights you drove through, how many of them were red when you entered the intersections?" Of the 880 respondents, 171 admitted that at least one light had been red. A practical problem with this survey is that people may not give truthful answers.

What is the likely direction of the bias: do you think more or fewer than 171 of the 880 respondents really ran a red light?

A. Fewer than 171 of the 880 respondents really ran a red light.

B. More than 171 of the 880 respondents really ran a red light.

Why would there be such a bias?

There is no bias in this survey.

People may be concerned that they will get in trouble if they admit to running red lights.

Those agreeing to respond may be more likely to have more time available and thus are less likely to run red lights.

The test suffers from sample bias.