In 2021, the Pew Research Center conducted a survey of a representative sample of 1,502 adults in the
U.S. to learn about smartphone ownership and access to broadband. Each person in the sample was asked
if they own a smartphone. The resulting data could be used to learn about the proportion of adults in the
United States who own a smartphone
Answer the four key questions.
Q, Question Type: Estimation or hypothesis testing?
S, Study Type: Sample data or experiment data?
T, Type of Data: One variable or two? Categorical or numerical?
N, Number of Samples or Treatments: How many samples or treatments?
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Q - estimation
S - sample data
T - one categorical variable
N - one sample
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Q, Question Type: Estimation or hypothesis testing?
- The question type is estimation. We are trying to estimate the proportion of adults in the United States who own a smartphone.
S, Study Type: Sample data or experiment data?
- The study type is sample data. The survey collected data from a representative sample of adults in the U.S.
T, Type of Data: One variable or two? Categorical or numerical?
- The type of data is one variable. We are only collecting data on smartphone ownership, which is a categorical variable.
N, Number of Samples or Treatments: How many samples or treatments?
- There is one sample in this study, which consists of the 1,502 adults surveyed.
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