Suppose you coded your 10 participants from Practice 5.1 as such:
Participant 1: Pepsi (sugary drink) Participant 6: Water (water)
Participant 2: Orange juice (juice) Participant 7: Water (water)
Participant 3: Sprite (sugary drink) Participant 8: 7-Up (sugary drink)
Participant 4: Water (water) Participant 9: Kool-Aid (sugary drink)
Participant 5: Coke (sugary drink) Participant 10: Apple juice (juice)
1. Find the frequency of sugary drinks, water, and juice in the sample.
2. What percentage of the sample was observed drinking water with dinner?
Suppose you asked 15 participants how many 8-ounce glasses of plain water they drink per day and obtained the following responses:
Participant 1: 3 glasses Participant 9: 4 glasses
Participant 2: 1 glass Participant 10: 12 glasses
Participant 3: none Participant 11: 5 glasses
Participant 4: 3 glasses Participant 12: 6 glasses
Participant 5: 5 glasses Participant 13: 4 glasses
Participant 6: 1 glass Participant 14: 3 glasses
Participant 7: 7 glassesParticipant 15: 3 glasses
Participant 8: 8 glasses
Calculate the cumulative percentage of 5 to 8 glasses of water per day:
3. Put the data into a frequency table.
4. Find the cumulative frequency for 5 to 8 glasses (cf[5,8]).
5. Calculate the cumulative percentage with the following formula, where N = total number of participants: (cf[5,8] /N)100