The mean age in months for preschool children was reported as 25.5. The standard deviation for Group 1 was 3.4 and for Group 2, 4.9. From this, we may conclude that
A) Group 1 is more variable than Group 2.
B) the mode for Group 1 is higher than that for Group 2.
C) Group 2 is more variable than Group 1.
D) the median age for Group 2 is higher than that for Group 1.

Question

Quizplus · Accepted Answer

The standard deviation is a measure of variability or dispersion in a dataset. A higher standard deviation indicates more variability. Since Group 2 has a higher standard deviation (4.9) compared to Group 1 (3.4), it means Group 2 is more variable than Group 1.

The Mean Age in Months for Preschool Children Was Reported