The Earth Has an Atmosphere Which Contains

question 21

Multiple Choice

The Earth has an atmosphere which contains ...

• A) oxygen
• B) nitrogen
• C) carbon dioxide
• D) argon
• E) all of the above

---

Definitions:

Population Variance

The variance of a population data set, calculating the mean of the squared deviations from the mean of the data.

Confidence Interval

A range of values, derived from the sample data, that is likely to contain the value of an unknown population parameter.

Sample Variance

A measure of variability that quantifies the spread of a sample data set; calculated as the sum of squared deviations from the sample mean, divided by the sample size minus one.

Population Variance

A measure of the dispersion or spread of a population dataset, calculated as the average of the squared differences from the population mean.