Question

1. the following data were used to find the state with the worst u.s. drivers. use it to answer the following questions.

a. is this an experiment or observational study? explain.
observational study we already have the data and just comparing it
b. state the observational units.
c. list the variables. are they categorical or quantitative? if quantitative identify whether they are discrete or continuous.
state (categorical)
num drivers (quantitative, continuous)
speeding (quantitative, discrete)
alcohol (quantitative, discrete)
distracted (quantitative, discrete)
no previous (quantitative discrete)
insurance (quantitative continuous)
losses (quantitative continuous)

Explanation:

a. It's an observational study as data is already available and being compared without any intervention.
b. The observational units are the states in the U.S. since data is collected and analyzed for each state to find the state with the worst drivers.
c. State is a categorical variable representing different states. Num drivers is a quantitative continuous variable as it can take any value within a range. Speeding, alcohol, distracted, no previous are quantitative discrete variables as they likely represent counts or whole - number values. Insurance and losses are quantitative continuous variables as they can have non - integer values within a range.

Answer:

a. Observational study. We are just comparing existing data without intervention.
b. States in the U.S.
c. State: Categorical
num drivers: Quantitative, Continuous
speeding: Quantitative, Discrete
alcohol: Quantitative, Discrete
distracted: Quantitative, Discrete
no previous: Quantitative, Discrete
insurance: Quantitative, Continuous
losses: Quantitative, Continuous