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? 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. key: 15|5 = 155 cm

Explanation:

Step1: Analyze the data distribution

Looking at the stem - and - leaf plot, for Class A, the data points are spread out with some lower values (e.g., 148, 151, 153) but also many higher values (e.g., 170, 171, 175, 176, 179, 179, 180, 182, 183, 186, 186, 190). For Class B, the data points are mostly concentrated in the lower - middle range (e.g., 153, 155, 156, 160, 162, 162, 162, 163, 163, 165, 166, 167, 170, 173, 180, 181, 182, 189, 192, 202).

Step2: Compare the central tendency (mean)

Since the mean is affected by the values of the data points. Class A has more data points in the higher ranges (170s, 180s, 190) compared to Class B. Class B has more data points in the lower - middle ranges (150s, 160s). So, the mean of Class A is much higher than the mean of Class B.

Answer:

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