In a survey of 1020 adults in the United States, 44 % said...

In a survey of 1020 adults in the United States, $44 \%$ said that they wash their hands after riding public transportation (based on data from KRC Research). a. Identify the sample and population. b. Is the value of $44 \%$ a statistic or parameter? c. What is the level of measurement of the value of $44 \% ?$ (nominal, ordinal, interval, ratio) d. Are the numbers of subjects in such surveys discrete or continuous?

In a survey of 1020 adults in the United States, $44 \%$ said that they wash their hands after riding public transportation (based on data from KRC Research).
a. Identify the sample and population.
b. Is the value of $44 \%$ a statistic or parameter?
c. What is the level of measurement of the value of $44 \% ?$ (nominal, ordinal, interval, ratio)
d. Are the numbers of subjects in such surveys discrete or continuous?

Key Concepts

Population and Sample

The population in a study refers to the complete set of individuals or elements of interest, while the sample is a subset of that population selected for the study. In survey research, the overall group (all US adults) is the population, and the 1020 adults who were surveyed represent the sample drawn from that population.

Statistic versus Parameter

A statistic is a numerical measure that describes a characteristic of a sample, whereas a parameter is a numerical measure that describes a characteristic of the entire population. Since the value of 44% is calculated from the sample data, it is considered a statistic rather than a parameter.

Level of Measurement

The level of measurement refers to the type of data and the mathematical operations that are valid for it. In the context of this survey, the 44% represents a ratio measurement because it is derived from a count of individuals in a category (those who wash their hands) relative to the total sample, and this ratio has a meaningful zero point.

Discrete versus Continuous

Discrete data are countable values, typically whole numbers, while continuous data can take on any value within a range. In surveys, the number of subjects or responses is counted, making these variables discrete because they can only take specific, separate values.

Transcript

Please give Ace some feedback