3. A Gallup poll surveys American beliefs about big business. The Gallup poll reports that 26% of Americans believe big business is the biggest threat to the nation. (Source: Gallup.com website article, In U.S., Fear of Big Government at Near-Record Level, December 12, 2011). Assume this value represents the population proportion today. Now, suppose we randomly sample Americans and ask them their beliefs about big business.   a. Suppose you surveyed 20 randomly selected U.S. adults. Is the sample size sufficient? Justify your answer with appropriate calculations.

What decisions can be made on the basis of The Harris Poll survey that measures the reputations of the most visible companies in the United States?

1. In a survey, 957 internet users chose to respond to this question posted on ratemyprofessors.com: How helpful are the reviews on this website? 92% of the respondents said “Very Helpful”.    a. Determine whether the study is an experimental or an observational study.  b. Identify the sample and the population.  c. Is the value 92% a statistic or a parameter?  d. Identify a major problem with the study.

Suppose you have a data set about whether a person received a new drug or a sugar pill and the number of hours of deep sleep. a. Which of the sources of data best describe the data set? b. Is the data set based on a sample or a population? ... a. Choose the correct answer below. O A. These data are results of an observational study. O B. These data are collected by ongoing business activities. OC. These data are outcomes of a designed experiment. O D. These data are responses from a survey. O E. These data are distributed by an organization. b. Choose the correct answer below. O A. The data was taken based on a population. O B. The data was taken based on a sample. O C. There is no way to know whether the data was taken based on a sample or a population.