Exploring Histograms and Their Applications

What is the primary purpose of using tally marks in data collection?

• To ensure data is collected randomly

• To keep track of the frequency of data points

• To make the data look more complex

• To reduce the accuracy of the data

What should be labeled on the axes of a histogram?

• The categories and their values

• The intervals and frequencies

• The names of the data collectors

• The total number of data points

What is the range of the first interval discussed in the histogram?

• 20 to 29

• 30 to 39

• 40 to 49

• 50 to 59

Why is it important for histogram bars to touch each other?

• To make the histogram visually appealing

• To use less space on the graph

• To differentiate it from bar graphs

• To show continuity of data

How many data points fall into the 40 to 49 interval in the histogram?

• 12

• 10

• 14

• 13

Which interval has the highest frequency in the histogram?

• 30 to 39

• 20 to 29

• 40 to 49

• 50 to 59

What does a stem-and-leaf plot primarily show?

• The differences between data points

• The frequency of data points within intervals

• The sum of all data points

• The average value of the data points

What is the total number of data points discussed in the stem-and-leaf section?

• 15

• 25

• 20

• 30

How do you convert a percentage into a frequency?

• Add the percentage to the total data points

• Divide the percentage by 100

• Multiply the percentage by the total number of data points

• Subtract the percentage from the total data points

What is the frequency for the 70 to 79 interval in the circle graph section?

• 20

• 30

• 50

• 40