Unit 6 Describing Data Cumulative Review

Front

What is the mean in a data set?

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.

Front

Which graph allows you to calculate the mean?

Back

Graph A only.

Front

What is the interquartile range (IQR)?

Back

The interquartile range is the difference between the first quartile (Q1) and the third quartile (Q3) in a data set, representing the range of the middle 50% of the data.

Front

Which graphs allow you to calculate the interquartile range?

Back

Graph A & C.

Front

What does the line of best fit represent in a scatter plot?

Back

The line of best fit represents the trend in the data, showing the relationship between the variables.

Front

If the line of best fit is y = 4.2x + 17, what is the predicted temperature after 3 hours?

Back

29.6 degrees.

Front

What is a correlation coefficient?

Back

A correlation coefficient is a statistical measure that describes the strength and direction of a relationship between two variables.

Front

What does a correlation coefficient of r = 0.14 indicate?

Back

Weak Positive correlation.

Front

What is a strong negative correlation?

Back

A strong negative correlation indicates that as one variable increases, the other variable decreases significantly.

Front

Which correlation coefficient represents a strong negative correlation?

Back

r = -0.94.