Shape, Center and Spread Practice

Front

What is the shape of a distribution that is symmetrical?

Back

A symmetrical distribution has a mirror-like property where the left and right sides are approximately equal.

Front

What is the mean of the following numbers: 47, 49, 54, 50, 48, 47, 55?

Back

Mean = 50

Front

What does it mean if a distribution is skewed left?

Back

A left-skewed distribution has a longer tail on the left side, indicating that the majority of the data points are concentrated on the right.

Front

What is the median of the following numbers: 47, 49, 54, 50, 48, 47, 55?

Back

Median = 49

Front

What is the shape of a distribution that is skewed right?

Back

A right-skewed distribution has a longer tail on the right side, indicating that the majority of the data points are concentrated on the left.

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.

Front

What does a uniform distribution look like?

Back

A uniform distribution has all outcomes equally likely, resulting in a flat shape.

Front

How do you calculate the median of a data set?

Back

To find the median, arrange the data in ascending order and identify the middle value.

Front

What is the definition of skewness in a distribution?

Back

Skewness measures the asymmetry of the probability distribution of a real-valued random variable.

Front

What is the first quartile (Q1)?

Back

Q1 is the median of the lower half of a data set, representing the 25th percentile.