AFDA Unit 7 HW 5
Name____________________
Date___________Block_____
1.
2. A voluntary response sample is one in which individuals decided to be included in the sample. Will this
type of sampling technique result in biased results? Explain your answer.
3. You want to determine the average family size of households in Virginia. You collect data consisting of
the number of siblings from students in you high school. Regardless of the sampling technique used, is the
sample representative of all households in the state? Explain your answer.
4. Determine if the following sampling technique results in a fair random sample. Explain your answer.
a. Your teacher obtains a sample by selecting the first six students entering class.
b. Your math classroom consists of 30 students in six different rows. Your teacher rolls a die to
determine a row, then rolls the die again to select a particular student in the row. This process is
repeated until a sample of 6 students is obtained.
5. Identify the population, sample, and the variable to be studied.
a. A study of 33,043 infants in Italy was conducted to find a link between a heart rhythm
abnormality and sudden infant death syndrome.
b. A survey of 2104 households in the United States found that 65% subscribe to cable television.
6. In order to assess the opinion of students at your high school, a reporter for the student newspaper
interviews the first six students he meets who are willing to express their opinions.
a. What is the population?____________________________________________
b. What is the sample?_______________________________________________
c. What is the method of sampling used? Explain your answer_______________
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d. How representative is this survey?____________________________________
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