Frequency Distributions

How many students spent over 40 minutes but under 60 minutes studying?

• 22

• 30

• 8

• 5

How many students received a score of 94%?

• 94

• 4

• 2

• 1

The vertical axis of a frequency polygon comes from this column:

• class width

• frequency

• class midpoint

• class boundaries

How many people visited the cinema twice?

• 28

• 20

• 25

• 30

The table above shows a cumulative frequency distribution of runners' ages. According to the table, how many runners are in their forties?

• 25

• 7

• 10

• 6

Within what frequency range did most students pay for their textbooks?

(Hint: Be careful with scales)

• 88-99

• 100-109

• 110-119

• 120-129

Is a histogram the same as a bar graph?

• Yes, because they both use intervals.

• No, because a histogram displays numerical data while a bar graph displays categorical data.

• Yes, because they both use bars to display data.

• No, because a histogram displays categorical data while a bar graph displays numerical data.

The horizontal axis of a frequency polygon comes from this column:

• Class width

• Frequency

• Midpoint

• Class Endpoints

• Class Boundaries

Use the given frequency distribution to find the

(a) class width

(b) midpoints of the first class

(c) boundaries of the first class

• (a) 3

  (b) 51

  (c) 50 - 52

• (a) 2

  (b) 51.5

  (c) 50 - 52

• (a) 3

  (b) 51

  (c) 49.5 - 52.5

• (a) 2

  (b) 51.5

  (c) 49.5 - 52.5

What are some benefits of representing data sets using frequency distributions?

• Organizing the data into a frequency distribution makes it possible to graph quantitative data

• It is easier to determine the minimum and maximum values of a data set when it has been arranged into a frequency distribution

• Organizing the data into a frequency distribution can make patterns within the data more evident.