17/08/2020 Assignment 1 - Basics of data
Assignment 1 - Basics of data
Click on a question number to see how your answers were marked and, where
available, full solutions.
Question Number Score
Question 1 7 / 7
Question 2 21 / 21
Question 3 4 / 4
Question 4 5 / 7
Question 5 2 / 2
Question 6 12 / 12
Question 7 2 / 6
Question 8 12 / 12
Total 65 / 71 (91%)
Performance Summary
Exam Name: Assignment 1 - Basics of data
Session ID: 01532605866
Student's Name: K (Katarina) Djordjevic (011cdd57506642ec949f60ac53aa58da)
Exam Start: Mon Aug 17 2020 10:56:07
Exam Stop: Mon Aug 17 2020 11:30:02
Time Spent: 0:33:54
Question 1
Researchers studying the e ect of antibiotic treatment for acute sinusitis compared to
symptomatic treatments randomly assigned 112 adults diagnosed with acute sinusitis to
one of two groups: treatment or control. Study participants received either a 10-day course
of amoxicillin (an antibiotic) or a placebo similar in appearance and taste. The placebo
https://numbas.up.ac.za/run_attempt/26261?resource_link_id=_1952333_1 1/23
, 17/08/2020 Assignment 1 - Basics of data
consisted of symptomatic treatments such as acetaminophen, nasal decongestants, etc. At
the end of the 10-day period patients were asked if they experienced significant
improvement in symptoms. The distribution of responses is summarised below.
Self-reported significant improvement on symptons
Yes No Total
Treatment 19 35 54
Group
Control 18 40 58
Total 37 75 112
a)
What fraction of patients in the treatment group experienced a significant
improvement in symptoms? Round your answer to two decimal places.
Expected answer: 0.35
0.35
Your answer is correct. You were awarded 2 marks.
You scored 2 marks for this part.
Score: 2/2
b)
What fraction of patients in the control group experienced a significant improvement in
symptoms? Round your answer to two decimal places.
Expected answer: 0.31
0.31
Your answer is correct. You were awarded 2 marks.
You scored 2 marks for this part.
Score: 2/2
c)
At first glance, does antibiotics appear to be an e ective treatment? Hint: calculate the
di erence between your answers for part (a) and (b).
https://numbas.up.ac.za/run_attempt/26261?resource_link_id=_1952333_1 2/23
Assignment 1 - Basics of data
Click on a question number to see how your answers were marked and, where
available, full solutions.
Question Number Score
Question 1 7 / 7
Question 2 21 / 21
Question 3 4 / 4
Question 4 5 / 7
Question 5 2 / 2
Question 6 12 / 12
Question 7 2 / 6
Question 8 12 / 12
Total 65 / 71 (91%)
Performance Summary
Exam Name: Assignment 1 - Basics of data
Session ID: 01532605866
Student's Name: K (Katarina) Djordjevic (011cdd57506642ec949f60ac53aa58da)
Exam Start: Mon Aug 17 2020 10:56:07
Exam Stop: Mon Aug 17 2020 11:30:02
Time Spent: 0:33:54
Question 1
Researchers studying the e ect of antibiotic treatment for acute sinusitis compared to
symptomatic treatments randomly assigned 112 adults diagnosed with acute sinusitis to
one of two groups: treatment or control. Study participants received either a 10-day course
of amoxicillin (an antibiotic) or a placebo similar in appearance and taste. The placebo
https://numbas.up.ac.za/run_attempt/26261?resource_link_id=_1952333_1 1/23
, 17/08/2020 Assignment 1 - Basics of data
consisted of symptomatic treatments such as acetaminophen, nasal decongestants, etc. At
the end of the 10-day period patients were asked if they experienced significant
improvement in symptoms. The distribution of responses is summarised below.
Self-reported significant improvement on symptons
Yes No Total
Treatment 19 35 54
Group
Control 18 40 58
Total 37 75 112
a)
What fraction of patients in the treatment group experienced a significant
improvement in symptoms? Round your answer to two decimal places.
Expected answer: 0.35
0.35
Your answer is correct. You were awarded 2 marks.
You scored 2 marks for this part.
Score: 2/2
b)
What fraction of patients in the control group experienced a significant improvement in
symptoms? Round your answer to two decimal places.
Expected answer: 0.31
0.31
Your answer is correct. You were awarded 2 marks.
You scored 2 marks for this part.
Score: 2/2
c)
At first glance, does antibiotics appear to be an e ective treatment? Hint: calculate the
di erence between your answers for part (a) and (b).
https://numbas.up.ac.za/run_attempt/26261?resource_link_id=_1952333_1 2/23
