The age of the oldest employee in the data processing department ...

[Pineappleeh]

the age of the oldest employee in the data processing department
 
  A) discrete B) continuous

Question 2

The effects of global warming on the planet have received increased national attention in recent years.
 
  But how many U.S. adults would be willing to change certain personal behaviors in order to help reverse the effects of global warming? A major pollster conducted a telephone poll of 1060 U.S. adults to determine the answer to the following questions: (1 ) Is public transportation a viable option for you? (2 ) If not, do you own a hybrid vehicle or one that gets more than an overall average of 30 miles per gallon? ( 3 ) If not, would you be willing to purchase a hybrid vehicle within the five years? Respondents were also asked questions about age, sex, race, education, region, and household income to ensure that results represented a cross section of U.S. adults.
  i) What kind of sampling design was used in this survey? Explain your answer.
  ii) If 86 of the respondents answered the first question in the negative, what was the approximate sample size for the second question?
  iii) If 71 of those responding to the second question answered no, what was the approximate size for the third question?

[ms_sulzle]

Answer to Question 1

B

Answer to Question 2

i) This is a poll taken by calling randomly selected U.S. adults. Thus, the sampling design appears to be simple random sampling, although it is possible that a more complex, multi-stage design was used to ensure that various political, educational, or other types of groups were proportionately represented in the sample.
ii) The approximate sample size for the second question was 86 of 1060, or 912.
iii) The approximate sample size for the second question was 71 of 912, or 647.