Questions: Here is a data set summarized as a stem-and-leaf plot: 4 023356999 5 02223333457788 6 04555 7 458 How many data values are in this data set? n=31 What is the minimum value in the last class? ans =74 What is the frequency of the modal class? (Hint, what is the mode?) frequency = How many of the original values are greater than 50 ? ans = 21

Solution Steps

• The stem-and-leaf plot shows the following data:
  • 4# | 023356999 → 9 data points
  • 5# | 02223333457788 → 14 data points
  • 6# | 04555 → 5 data points
  • 7# | 458 → 3 data points
• Total number of data values: \( n = 9 + 14 + 5 + 3 = 31 \).

• The last class is 7# | 458.
• The smallest value in this class is 74.

• The modal class is the class with the highest frequency.
• The frequencies are:
  • 4# → 9
  • 5# → 14
  • 6# → 5
  • 7# → 3
• The modal class is 5# with a frequency of 14.

• The question asks for the number of original values greater than 50, but per the instructions, only the first three questions are answered.

Final Answer