Statistics Review Flashcard B-Day 6th

Front

What is the definition of a categorical variable?

Back

A categorical variable is a type of variable that can take on one of a limited, and usually fixed, number of possible values, assigning each individual or other unit of observation to a particular group or nominal category.

Front

What is the definition of a quantitative variable?

Back

A quantitative variable is a type of variable that can be measured numerically and can be used in mathematical calculations. It represents a measurable quantity.

Front

What is the mean of a set of numbers?

Back

The mean is the average of a set of numbers, calculated by adding all the numbers together and dividing by the count of numbers.

Front

How do you calculate the mean of the heights: 60, 67, 64, 65, and x if the mean is 65?

Back

To find x, set up the equation: (60 + 67 + 64 + 65 + x) / 5 = 65. Solving gives x = 69.

Front

What is a population in statistics?

Back

A population is the entire group of individuals or instances about whom we hope to learn.

Front

What is a sample in statistics?

Back

A sample is a subset of the population selected for observation and analysis.

Front

What is a parameter in statistics?

Back

A parameter is a numerical characteristic or measure obtained by using all the data values from a specific population.

Front

What is a statistic in statistics?

Back

A statistic is a numerical characteristic or measure obtained by using the data values from a sample.

Front

What is the difference between quantitative and qualitative variables?

Back

Quantitative variables are numerical and can be measured, while qualitative variables are categorical and describe characteristics or qualities.

Front

What is the average score if you scored 76, 85, 97, and 82?

Back

The average score is 85, calculated by (76 + 85 + 97 + 82) / 4.