Question

the side - by - side stemplot below displays the arm spans, in centimeters, for two classes. which statement correctly compares the arm spans for class a to those of class b? class a arm span (cm) class b 8 14 3 1 15 3 9 6 5 15 5 6 4 2 1 16 0 2 2 2 3 3 9 9 5 16 5 6 7 1 0 17 0 3 9 9 6 5 17 3 2 0 18 0 1 2 6 6 18 9 0 19 2 19 20 2 key: 15|5 = 155 cm the mean arm span for class a is much lower than class bs. the mean arm span for class b is much lower than class as the mean arm span for class a is much higher than class bs. the mean arm span for class b is about the same as class as

Explanation:

Step1: Analyze the data distribution

Looking at the stem - plot, most of the data values for Class A are in the higher stems (17, 18, 19) compared to Class B. For example, Class A has more values in the 170 - 190 range.

Step2: Compare the means conceptually

Since the mean is a measure of central tendency and Class A has more of its data points at higher values (arm spans), the mean of Class A will be higher than that of Class B.

Answer:

The mean arm span for Class A is much higher than Class B's.