MIDTERM PRACTICE EXAM B

MIDTERM PRACTICE EXAM B

Assessment

Flashcard

Mathematics

9th - 12th Grade

Practice Problem

Hard

Created by

Wayground Content

FREE Resource

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15 questions

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1.

FLASHCARD QUESTION

Front

What is 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 on the basis of some qualitative property.

2.

FLASHCARD QUESTION

Front

What is a quantitative variable?

Back

A quantitative variable is a type of variable that can be measured and expressed numerically, allowing for mathematical operations to be performed on the values.

3.

FLASHCARD QUESTION

Front

What is the mean in statistics?

Back

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

4.

FLASHCARD QUESTION

Front

What is standard deviation?

Back

Standard deviation is a measure of the amount of variation or dispersion in a set of values, indicating how much individual data points differ from the mean.

5.

FLASHCARD QUESTION

Front

What does a correlation coefficient of r = -0.05 indicate?

Back

A correlation coefficient of r = -0.05 indicates a very weak negative linear relationship between two variables.

6.

FLASHCARD QUESTION

Front

What is a least-squares regression line?

Back

A least-squares regression line is a straight line that best fits the data points in a scatter plot, minimizing the sum of the squares of the vertical distances of the points from the line.

7.

FLASHCARD QUESTION

Front

What is an interquartile range (IQR)?

Back

The interquartile range (IQR) is a measure of statistical dispersion, calculated as the difference between the third quartile (Q3) and the first quartile (Q1) of a data set.

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