Answer:
Histograms are common, as are frequency polygons. Frequency polygons are a graphical device for understanding the shapes of distributions. They serve the same purpose as histograms, but are especially helpful in comparing sets of data.
The correct answer is letter B
Explanation: This technique is very common and consists of selecting a population sample that is accessible. That is, the individuals employed in this research are selected because they are readily available, not because they were selected using a statistical criterion.
Answer: False.
Explanation:
The Roman army was made up of groups of soldiers called legions. Legio: (Legion) consisted of 10 cohorts, about 5,000 min. Eques Legionis: Each legio had a cavalry unit of 120 attached to them.
A Roman soldier was a well-trained fighting machine. ... Roman soldiers weren't always at war - they spent most of their time training for battle. They practiced fighting in formation and man-to-man. Legionaries also patrolled their conquered territories and built roads, forts, and aqueducts (a bridge which carried water).
