^ 26. Error Analysis Malik is conducting a survey about the legal voting age in the
United States. His question is, "Isn’t the legal voting age too high?” When his
friends suggested that his question was biased, he revised it to be, "Don't you
think the legal voting age should be lower?” Describe and correct the error in his
rewritten survey question.In each situation, identify the population and sample. Tell whether each sample
is a ran d o m , system atic, or stratified sample.- For one month, the owner of a sporting goods store asks every fifteenth customer
which sport he or she most enjoys watching on TV. - One student from each club is chosen at random to represent the school at the
school fair. - At a high school football game, every spectator places his or her ticket stub in a
bowl. After the game, the coach chooses ten people to march in the victory parade. - A restaurant asks every third customer to complete an evaluation form.
Classify the data as qualitative or quantitative and as univariate or bivariate.
31. average number of visitors per day at each of six different theme parks- monthly low temperatures in Rochester, New York
- names of U.S. presidents and the states they were born in
- favorite color and a person's gender
- Sports A student posts a survey on a Web site asking St u d e n t s' Fa v o r i t e
readers to choose their favorite sport to play from a list of
five sports. The results are shown at the right.
a. What biases might exist as a result of the design of
this survey?
b. Do you believe the results of this survey are valid?
Explain your answer. - Writing You are writing an article for the school
newspaper about support for the mayor’s proposal for bike
paths. For each situation below, determine whether the MRS
data collection method will result in an unbiased sample of INK
town residents. Explain your answer.
a. You survey every tenth person leaving a bicycle repair store.
b. You call homes in your neighborhood every morning Monday through
Friday for one week.
c. You send an e-mail to 100 classmates chosen at random.
d. You poll every fifth person at a popular local sandwich shop. - Market Research A perfume company sends a sample of a new scent to 500 homes.
Each responder who sends back a response card saying how much she likes the
scent will have a chance to win a bottle of perfume. How will this affect the results?
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Baseb al l758 Ch ap t er 12 Dat a A n al ysi s an d Pr o b ab i li t y