Page 203 - Algebra 1

ZooSurvey Researchersforanadvertisingcampaignsurveypeopletofind out why they like to visit the zoo.
4. Give an example of an unbiased sample for this survey.
5. Describe a systematic sampling method.
6.Justify Woulditbebiasedtoonlysurveyfamilieswithchildren?Explain.
BiasedQuestions Occasionally,researchersaskbiasedquestionsthat force the person being questioned to respond with a particular answer. For instance, “Didn’t you eat enough?” uses a negative question, which indicates that the person who is being questioned has eaten enough.
Write Create one biased and one non-biased question for each survey.
7. A restaurant owner polls ten patrons on whether they enjoyed the
chef’s special.
8. A music store questions five customers about their listening habits.
Marketing Advertisers may accidentally or intentionally present data in a misleading way. Consider these graphs of the data collected from a survey of pet owners.
Hints
Biased sampling methods exclude certain members of the population.
Biased questions exclude unsatisfactory responses.
Graph A: This could be misleading because of the break in the graph. It appears that the number of people who have dogs is much greater than those who have cats, birds, or fish.
Graph B: This could be misleading because there are no labels on the vertical axis. It is not possible to determine whether each grid represents
1 person or 100 people.
Graph A
8 7 6 5 4
Cat Dog Bird Fish
Favorite pets Graph B
Cat Dog Bird Fish
Graph C: This is not misleading. The vertical scale starts at 0 and the intervals are equal.
Favorite pets Graph C
8 7 6 5 4 3 2 1 0
Cat Dog Bird Fish
Favorite pets
188 Saxon Algebra 1
Number of people
Number of people
Number of people