AP Statistics Unit 1 Review

Front

What are the stems used in a stemplot for the ages: 3, 10, 42, 25, 5, 8, 6, 12, 15, 4, 3, 21?

Back

0, 1, 2, 3, and 4

Front

What weight is closest to the median in a cumulative relative frequency graph of tomato weights?

Back

140 gm

Front

How do you calculate the interquartile range (IQR) from a boxplot?

Back

IQR = Q3 - Q1; for the given boxplot, the IQR is approximately 16.

Front

What is the Normal Model Rule?

Back

68-95-99.7

Front

How do you determine the percentile rank of a value in a data set?

Back

Percentile rank = (number of values below the given value / total number of values) * 100.

Front

What is a stemplot and how is it used?

Back

A stemplot is a graphical representation of quantitative data that separates each value into a stem (the leading digit) and a leaf (the trailing digit).

Front

Define cumulative relative frequency.

Back

Cumulative relative frequency is the sum of the relative frequencies for all values up to a certain point in a data set.

Front

What does a boxplot represent in statistics?

Back

A boxplot visually summarizes the distribution of a data set, showing the median, quartiles, and potential outliers.

Front

What is the significance of the median in a data set?

Back

The median is the middle value that separates the higher half from the lower half of the data set.

Front

Explain the concept of interquartile range (IQR).

Back

The IQR measures the spread of the middle 50% of a data set, calculated as Q3 - Q1.