Data Investigation Exam

Front

What percentage of the data is between 40 and 90?

Back

25 %

Front

Interpret the slope of the linear regression equation y = 1.5x + 12.

Back

The slope is 1.5. It means that it costs $1.50 per topping.

Front

How would you describe a distribution that is symmetrical?

Back

A symmetrical distribution has equal halves on either side of the center.

Front

In a right-skewed distribution, what is the relationship between the mean and median?

Back

mean > median

Front

What does a box-and-whisker plot show?

Back

It shows the distribution of data based on five summary statistics: minimum, first quartile, median, third quartile, and maximum.

Front

What is the interquartile range (IQR)?

Back

The IQR is the difference between the third quartile (Q3) and the first quartile (Q1). It measures the spread of the middle 50% of the data.

Front

What does it mean if a distribution is left-skewed?

Back

In a left-skewed distribution, the tail on the left side is longer or fatter than the right side.

Front

What is the median?

Back

The median is the middle value of a data set when it is ordered from least to greatest.

Front

What is a linear regression equation?

Back

A linear regression equation models the relationship between two variables by fitting a linear equation to observed data.

Front

What does the term 'outlier' refer to in a data set?

Back

An outlier is a data point that differs significantly from other observations in the data set.